OBS2018

2018 Visual & CCD Observations: 41 comets - 1286 observations
Año 2018 – Observaciones Visuales y CCD / DSLR de Cometas
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C/2018 Y1 (Iwamoto) 
2018 Dec. 30.69 UT: m1=11.3, Dia.=1.4’, DC=2/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight. Coma diffuse, slight brightening to centre, enhances in Swan band filter. Visible at x39 but just above background sky threshold under moonlit conditions, difficult to obtain measurement at that scale. Elongation from the Moon is approximately 21 degrees. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Dec. 30.29 UT: m1=10.9:, Dia.=1.5′, DC=4, ... 22-cm L(160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [moonlight]

C/2018 V1  (Machholz-Fujikawa-Iwamoto) 
2018 Dec. 08.75 UT: m1=9.0, Dia.=3′, DC=4 ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Dec. 06.76 UT: m1=8.9, Dia.=5′, DC=4 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Astronomical twilight. Zodiacal light. Altitude: 10 deg. Sidgwick method. Tycho-2 comparison stars]
2018 Dec. 05.75 UT: m1=9.1, Dia.=3′, DC=3 ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Nov. 24.23 UT: m1=8.6, Dia.=4.5′, DC=6 ... 10.2-cm R(20x) ... Carlos Labordena (Castellón, España)
2018 Nov. 18.19 UT: m1=8.0, Dia.=4’, DC=4 ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 17.19 UT: m1=8.2, Dia.=3.5’, DC=4 ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 16.24 UT: m1=7.7, Dia.=6′, DC=5, Tail= 0.4 deg. in PA: 300 deg. ... 25×100 B ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [Zodiacal light. Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.4.]
2018 Nov. 16.14 UT: m1=8.2, Dia.=4′, DC=4/ ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.30]
2018 Nov. 14.32 UT: m1=7.8:, Dia.=4′, DC=3 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet altitude: 14°/Civil twilight with sun altitude: -10°/clouds]
2018 Nov. 14.18UT: m1=8.7, Dia.=1.3′, DC=6 ... 60-cm L(81x) ... Sandor Szabo (Sopron, Hungary)
2018 Nov. 13.32 UT: m1=8.0, Dia.=3′, DC=3/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet altitude: 13° / Nautical twilight with sun altitude: -12°]
2018 Nov. 13.23 UT: m1=8.0, Dia.=5′, DC=6, Tail= 0.2 deg. in PA: 290 deg. ... 25×100 B ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1280 m, 43º 10′ N, 5º 54′ W) [Zodiacal light. Altitude: 18 deg. In 20-cm SCT (77x): m1=8.2, Dia.=4′, DC=5. Sidgwick method. Tycho-2 comparison stars. SQM: 20.7]
2018 Nov. 13.12 UT: m1=7.7, Dia.=2′, DC=6 ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.65]
2018 Nov. 12.32 UT: m1=8.0:, Dia.=3′, DC=4 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet very near a star with m1: 6.01 and 14° altitude / Nautical twilight with sun altitude: -12°]
2018 Nov. 11.73 UT: m1=8.8, Dia.=4.4’, DC=6 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 6.0°. Twilight interference. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 10.72 UT: m1=8.9, Dia.=2.3’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 4.9°. Slight twilight interference. Enhances well in Swan Band filter. Coma circular in shape, faintly stellar, opaque centre, no tail visible. Pale-aqua blue in colour. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 09.22 UT: m1=9.9, Dia.=4′, DC=3/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [Close to the ephemeris position. Motion obvious, followed for a 50-min period. Near-stellar central condensation, m2=12.5: (GSC). Nearby field stars checked in DSS. Visual astrometry: R.A.= 12h26m.2, Decl.= -1o59′.2 (equinox 2000.0). Sidgwick method. Tycho-2 comparison stars. Mountain location, very clear sky. Altitude: 17 deg. Zodiacal light. SQM: 20.4]

C/2018 N2 (ASASSN)  
2018 Dec. 28.46 UT: m1=13.9, Dia.=1.5’, DC=6 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faintly stellar in good seeing, diffuse coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Dec. 27.45 UT: m1=13.7, Dia.=1.1’, DC=5/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, faintly stellar in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Nov. 29.50 UT: m1=14.3, Dia.=1’, DC=6 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse outer coma, small pseudo-nucleus visible. Difficult due to proximity to bright star in field. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Nov. 26.45 UT: m1=14.0, Dia.=1’, DC=3/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult. Diffuse outer coma, small central condensation. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 11.68 UT: m1=14.0, Dia.=1’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult. Small coma. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 10.66 UT: m1=14.0, Dia.=1.5’, DC=3/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult due to bright star in field, coma small. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 03.42 UT: m1=14.3, Dia.=0.5’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult. Diffuse outer coma, opaque inner coma, weakly condensed. Limiting magnitude= 15.0. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Oct. 30.45 UT: m1=14.0, Dia.=0.8’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very small, slightly brighter centre. Motion checked over 1 hour period, close to mag 14.9 star. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

C/2018 N1 (NEOWISE) 
2018 Oct. 03.81 UT: m1=10.0, Dia.=4′, DC=2 ... 20-m SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Altitude: 9 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.7]
2018 Sep. 08.39 UT: m1=12.9, Dia.=1.8’, DC=1/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very difficult, diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Sep. 07.43 UT: m1=12.4, Dia.=2’, DC=2 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. Thunderstorms and lightning in vicinity making obs difficult. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Sep. 01.86 UT: m1=9.3, Dia.=10′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Several stars inside the coma, the brightest being mag. 10.1 (TK). Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Aug. 14.89 UT: m1=8.9, Dia.=9′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 21 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Aug. 14.47 UT: m1=10.4, Dia.=5.4’, DC=2 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, transparent and weakly condensed. Enhances slightly in Swan band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Aug. 13.38 UT: m1=10.2, Dia.=6.4’, DC=3 ... 25-cm L f:5(x39) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse and transparent with slight brightening to an opaque centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Aug. 11.84 UT: m1=10.8, Dia.=1.5′, DC=d2 ... 0.60-m f/4 L(188x) ... Gabor Santa (Tarján, Hungary) [very diffuse, borderless coma with weak condensation, outer regions are very dim. h=15 deg.]
2018 Aug. 10.09 UT: m1=9.6, Dia.=7′, DC=1/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Method: S]
2018 Aug. 10.06 UT: m1=9.8, Dia.=5′, DC=2 ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Method: S]
2018 Aug. 09.94 UT: m1=9.0, Dia.=7′, DC=3 ... 30.5-cm L (97x) ... J. P. Navarro Pina (Fuente Caputa, Murcia, Spain) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.6 at zenith. Lm= 5.9]
2018 Aug. 09.89 UT: m1=8.8, Dia.=10′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Diffuse and wide coma. Observation made under better conditions, providing a wider coma diameter and brighter m1 estimate in comparison with my previous Aug. 7 observation. Altitude: 22 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1 ... 21.6 at zenith]
2018 Aug. 08.39 UT: m1=9.8, Dia.=5.2’, DC=2/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, transparent coma, weakly condensed. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Aug. 07.96 UT: m1=9.2, Dia.=8′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 12 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0 ... 21.5 at zenith]
2018 Aug. 06.59 UT: m1=9.7, Dia.=10’, DC=2 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma visible as a large weakly condensed patch of light. Enhances well in Swan Band filter. Sky background appears light in colour due to nearby Rho Ophiuchi region. Comparison stars checked using Tycho-2 data in Gu,de 9.0, Method= S, Cat= TK]
2018 Aug. 03.87 UT: m1=9.1, Dia.=8′, DC=2 ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Aug. 02.35 UT: m1=9.1, Dia.=9.3’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, weakly condensed. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Aug. 01.91 UT: m1=8.5, Dia.=11′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Very diffuse and wide coma. Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 Aug. 01.39 UT: m1=9.3, Dia.=6′, DC=2 ... 25×100 B ... David A. J. Seargent (Cowra, NSW, Australia) [Rather slight but noticeable enhancement using Swan Band filter. Very diffuse and of low surface brightness]
2018 Aug. 01.35 UT: m1=9.8, Dia.=8.3’, DC=2 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint stars in coma. Coma large, transparent and diffuse. Enhances slightly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 July 31.90 UT: m1=8.5, Dia.=12′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Very diffuse and wide coma. Altitude: 16 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.8, 21.5 at zenith]
2018 July 30.35 UT: m1=9.2, Dia.=7’, DC=2 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse and large. Enhances slightly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 July 23.74 UT: m1=9.5, Dia.=9’, DC=4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse. Moderately condensed opaque centre, faint star in coma. Comparison stars checked using Tycho-2 data in Guide 9.0. Method= M. Cat= TK]
2018 July 22.09 UT: m1=8.3, Dia.=15′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Quintanilla de los Oteros, Leon, Spain. Alt. 860 m, 42º 19′ N, 5º 24′ W) [Very diffuse and wide coma. Altitude: 17 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 July 20.73 UT: m1=9.7, Dia.=5.2’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, slight brightening to centre. Comparison stars checked using Tycho-2 data in Guide 9.0. Method= S. Cat= TK]
2018 July 18.75 UT: m1=9.9, Dia.=6.8’, DC=3/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0. Method= M. Cat= TK]
2018 July 18.19 UT: m1=11.1, Dia.=3′, DC=2 ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 July 18.11 UT: m1=8.8, Dia.=12′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Mag. 11.0 (TK) star in coma. Altitude: 21 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 July 16.72 UT: m1=10.1, Dia.=5.5’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to bright star, weakly condensed. Coma slightly elongated to NW. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 July 15.55 UT: m1=10.7, Dia.=4’, DC=2/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 17.2°. Coma very diffuse and weakly condensed. Enhances in Swan band filter. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 15.25 UT: m1=11.7, Dia.=3′, DC=2/ ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 July 15.10 UT: m1=11.2, Dia.=2′, DC=2 ... 20-cm T(80x) ... Carlos Labordena (Castellón, España) [no tail]
2018 July 14.04 UT: m1=11.6, Dia.=1.1′, DC=1 ... 60-cm L (187x) ... Sandor Szabo (Sopron, Hungary)
2018 July 13.75 UT: m1=10.3, Dia.=5’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint stars in coma. Very diffuse coma, slightly brighter but weakly condensed centre. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 July 13.72 UT: m1=12.0, Dia.=1.8′, DC=2/ ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 11.75 UT: m1=11.1, Dia.=4.1’, DC=2/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter, very diffuse, weakly condensed. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 10.10 UT: m1=9.4, Dia.=12′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Brighter than expected. From dark mountain skies the comet shows a large and very diffuse outer coma. Field stars checked in DSS. Altitude: 17 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 July 09.82 UT: m1=11.2:, Dia.=5’, DC=2 ... 25×100 B ... Michael Mattiazzo (Swan Hill, Vic, Australia) [First visual observation. Very diffuse coma that enhances slightly using a Swan band filter]
2018 July 09.64 UT: m1=11.5, Dia.=3.3’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre. Close to mag 11.8 star. Visible at x39 but difficult to separate from star. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 08.791 UT: m1=11.4, Dia.=4′, DC=2 ... 40.6-cm L F/4 (76x) ... Paul Camilleri (Katherine, NT, Australia)

C/2018 L2 (ATLAS) 
2018 Dec. 29.77 UT: m1=9.7, Dia.=4.5′, DC=2/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 14 deg. Sidgwick method. Tycho-2 comparison stars]
2018 Dec. 06.77 UT: m1=9.2, Dia.=4.5′, DC=3 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 14 deg. Sidgwick method. Tycho-2 comparison stars]
2018 Dec. 01.38 UT: m1=11.7, Dia.=1.3′, DC=3 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 30.37 UT: m1=11.3, Dia.=1.3′, DC=4 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 06.72 UT: m1=9.8, Dia.=4’, DC=2 ... 20×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 03.78 UT: m1=9.1, Dia.=6′, DC=2/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Zodiacal light. Altitude: 15 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.7]
2018 Oct. 03.82 UT: m1=9.8, Dia.=5′, DC=2/ ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Brighter than expected. Altitude: 13 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.8]

C/2018 EF9 (Lemmon) 
2018 May  21.12 UT: m1=11.5, Dia.=3.5′, DC=1/ ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. Field stars checked in DSS. SQM: 21.5]
2018 May  16.01 UT: m1=11.8, Dia.=3′, DC=1/ ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. APASS comparison stars. Brighter than expected. From dark mountain skies the coma appears large and very diffuse, without central condensation. Motion checked over a 120-min period. Field stars checked in DSS. Limiting star magnitude near comet: 14.7 (GSC). SQM: 21.4]

C/2018 С2 (Lemmon) 
2018 July 13.91 UT: m1=15.8, Dia.=0.2′, DC=6 ... 60-cm L (406x) ... Sandor Szabo (Sopron, Hungary) [Motion was checked]
2018 Apr. 22.83 UT: m1=16.4 CCD, Dia.=0.22′, DC=9 ... 0.25-m f/4.7 reflector + CCD ... Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2018 Apr. 11.91 UT: m1=16.6 CCD, Dia.=0.30′, DC=9 ... 0.25-m f/4.7 reflector + CCD ... Sergey Shurpakov (Observatory C36, Baran’, Belarus)

C/2018 A3 (ATLAS) 
2018 Nov. 14.16UT: m1=[16,0 NEGATIVE ... 60-cm L(406x) ... Sandor Szabo (Sopron, Hungary)
2018 Oct. 13.10 UT: m1=16.0 CCD, Dia.=0.28′, DC=8 ... 0.20-m f/4 Schmidt-Newton + CCD ... S. Shurpakov (Observatory A98, Belarus)
2018 Apr. 06.96 UT: m1=[16.2, negative ... 60-cm reflector (517x) ... Sandor Szabo (Sopron, Hungary)

P/2017 U6 (PANSTARRS) = P/2011 WG113  
2018 Apr. 07.95 UT: m1=17.4 CCD, Dia.=0.26′, DC=9 ... 0.25-m f/4.7 reflector + CCD ... Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2018 Apr. 06.91 UT: m1=[16.2, negative ... 60-cm reflector (407x) ... Sandor Szabo (Sopron, Hungary)

C/2017 T3 (ATLAS) 
2018 Aug. 29.37 UT: m1=12.3, Dia.=1.4’, DC=2/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Low altitude= 13.4°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 14.36 UT: m1=10.2, Dia.=3.3’, DC=3 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 6.3°. Moonlight. Very diffuse. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Aug. 13.36 UT: m1=10.2, Dia.=2.6’, DC=4 ... 25-cm L f:5(x39) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 5.4°. Coma diffuse, moderately condensed, slight twilight interference. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Aug. 08.79 UT: m1=9.6, Dia.=3.2’, DC=5/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 4.8°. Diffuse, compact and opaque centre. Slight Moonlight/twilight interference (Moon Alt= 8.0°, 9.7% illuminated). Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 July 26.37 UT: m1=8.6:, Dia.=4′, DC=4 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet altitude: 12° / Sul -12° – nautical twilight]
2018 July 23.79 UT: m1=9.2, Dia.=2.2’, DC= 5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 6.7°. Opaque centre, pale aqua-blue in colour. Enhances strongly in Swan band filter. Comparison stars checked using Tycho-2 data in Guide 9.0. Method= M. Cat= TK]
2018 July 20.79 UT: m1=9.2, Dia.=3.7’, DC=5/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 6.7°. Opaque inner coma, aqua-blue in colour, stellar in good seeing. Comparison stars checked using Tycho-2 data in Guide 9.0. Method= M. Cat= TK]
2018 July 18.79 UT: m1=9.3, Dia.=3’, DC=5/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 7.8°. Coma small and well condensed with an opaque centre, appears stellar in moments of good seeing. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0. Method= M. Cat= TK]
2018 July 18.37 UT: m1=8.7, Dia.=4′, DC=4/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet altitude: 13°, sun altitude: -13° / nautical twilight]
2018 July 16.79 UT: m1=8.9, Dia.=5.2’, DC=5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 7.7°. Opaque centre, well condensed, semi-transparent outer coma. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 July 13.79 UT: m1=9.4, Dia.=3’, DC=6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 7.2°. Enhances in Swan Band filter. Faint tail visible, traced to 3.8’ in length in P.A. 260° approximately. Faint stellar central condensation, opaque centre, diffuse edges. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 July 11.79 UT: m1=9.3, Dia.=4.4’, DC=4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 7.4°. Coma diffuse, moderately condensed, opaque centre. Hint of coma extension to the SW approximately. Slight interference from zodiacal light. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 June 23.81 UT: m1=8.8, Dia.=4.1’, DC=4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 4.9°. Enhances in Swan Band filter. Opaque centre, moderately condensed. Zodiacal light and twilight interference. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 June 22.81 UT: m1=9.4, Dia.=2.8’, DC=4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, moderately condensed. Enhances in Swan Band filter. Low altitude= 5.7°, interference from zodiacal light and twilight. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Apr. 06.80 UT: m1=[14.2, negative ... 60-cm reflector (305x) ... Sandor Szabo (Sopron, Hungary) [Only 10 deg above horizon]

C/2017 T2 (PANSTARRS) 
2018 Nov. 14.03 UT: m1=15.7, Dia.=0.25′, DC=3 ... 60-cm L(305x) ... Sandor Szabo (Sopron, Hungary)

C/2017 T1 (Heinze) 
2018 Feb. 21.24 UT: m1=9.3, Dia.=4′, DC=3 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Villacintor, Leon, Spain. Alt. 930 m, 42º 29′ N, 5º 11′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.7. Altitude: 8 deg. Very clear sky down to the horizon]
2018 Feb. 10.79 UT: m1=9.8, Dia.=2′, DC=3, no tail ... 20-cm SCT (50x) ... Carlos Labordena (Castellón, España)
2018 Jan. 18.85 UT: m1=10.2, Dia.=3.5′, DC=2, no tail ... 20-cm SCT (80x) ... Carlos Labordena (Castellón, España)
2018 Jan. 17.85 UT: m1=10.1, Dia.=4′, DC=2/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. Alt. 1350 m, 42º 54′ N, 5º 50′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Jan. 17.80 UT: m1=10.1, Dia.=2.5′, DC=2/ ... 25.4-cm L f:5 (64x) ... Maik Meyer (Limburg, Germany)
2018 Jan. 16.78 UT: m1=10.4, Dia.=4′, DC=2 ... 25.4-cm L f:5 (64x) ... Maik Meyer (Limburg, Germany)
2018 Jan. 14.76 UT: m1=10.3, Dia.=2.5, DC=2 ... 25.4-cm L f:5 (64x) ... Maik Meyer (Limburg, Germany)
2018 Jan. 10.86 UT: m1=10.6, Dia.=2.5′, DC=2, no tail ... 20-cm SCT (80x) ... Carlos Labordena (Castellón, España)
2018 Jan. 10.76 UT: m1=10.8, Dia.=2.5′, DC=2 ... 30.5-cm L (97x) ... J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain)
2018 Jan. 08.87 UT: m1=10.2, Dia.=4′, DC=2/, Tail= 0.2 deg. in PA: 90 deg. ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Valdespino Cerón, Leon, Spain. Alt. 830 m, 42º 15′ N, 5º 22′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1. Rapid motion obvious]
2018 Jan. 07.78 UT: m1=9.4, Dia.=2.5′, DC=3 ... 11.4-cm L f/6 (45x) ... Neil Norman FRAS (Ipswich, England)
2018 Jan. 06.51 UT: m1=10.3, Dia.=4′, DC=1 ... 40.0-cm L f/4.5 (36x) ... Seiichi Yoshida (Ibaraki, Japan)
2018 Jan. 04.787 UT: m1=9.5, Dia.=3′,DC=3 ... 11.4-cm L f/6 (45x) ... Neil Norman FRAS (Ipswich, England)
2018 Jan. 03.771 UT: m1=9.9, Dia.=3′, DC=4 ... 11.4-cm L f/6 (45x) ... Neil Norman FRAS (Ipswich, England) [Appears elongated in PA: 177 degrees]

C/2017 K6 (Jacques) 
2018 Feb. 10.43 UT: m1=13.8, Dia.=1.5’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 08.43 UT: m1=13.9, Dia.=1.0’, DC=2/3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 07.43 UT: m1=13.8, Dia.=1.4’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 06.44 UT: m1=13.9, Dia.=1.1’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to faint stars. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 05.44 UT: m1=13.8, Dia.=1.4’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse. Difficult due to glare from nearby star to NW. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 22.50 UT: m1=13.7, Dia.=1.2’, DC=3 ... 25-cm L f:5 (83x) Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight interference by moonlight. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 20.43 UT: m1=13.6, Dia.=1.5’, DC=3/4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse. Central condensation appears pale aqua-blue in colour, moderately condensed. Slight moonlight interference. Does not appear to enhance in Swan Band filter. Faintly visible at x39. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 19.48 UT: m1=13.6, Dia.=1.2’, DC=2 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma weakly condensed and diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 17.46 UT: m1=13.8, Dia.=1’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, sometimes appears to have a faint stellar central condensation in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 16.46 UT: m1=13.8, Dia.=1’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, close to stars, slight interference. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 15.47 UT: m1=13.9, Dia.=1.3’, DC=3/4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed central condensation that sometimes appears stellar in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 14.47 UT: m1=13.8, Dia.=1.6’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Comet in between stars, difficult. Coma diffuse, slight brightening at centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 12.44 UT: m1=13.7, Dia.= 0.8’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma appears as a hazy patch with slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 05.46 UT: m1=14.0, Dia.=0.8’, DC=3 ... 25.cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

C/2016 R2 (PANSTARRS) 
2018 Nov. 16.16 UT: m1=10.2, Dia.=7′, DC=1/ ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [Faint tail difficult to separate from the coma. The magnitude estimate is related to the observed width of the coma and tail. Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.7]
2018 Nov. 14.13 UT: m1=12.8, Dia.=1.2′, DC=1 ... 60-cm L(244x) ... Sandor Szabo (Sopron, Hungary)
2018 Nov. 13.16 UT: m1=10.2, Dia.=7′, DC=1/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1280 m, 43º 10′ N, 5º 54′ W) [Faint tail difficult to separate from the coma. The magnitude estimate is related to the observed width of the coma and tail. Mag. 12.1 (TK) star in coma. Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.7]
2018 Nov. 09.19 UT: m1=10.3, Dia.=6′, DC=1/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [Faint tail difficult to separate from the coma. The magnitude estimate is related to the observed width of the coma and tail. Altitude: 25 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.7]
2018 Nov. 03.80 UT: m1=10.5, Dia.=5′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Faint tail difficult to separate from the coma. The magnitude estimate is related to the observed width of the coma and tail. Altitude: 14 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Nov. 03.80 UT: m1=[11.8, negative ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 20.20 UT: m1=11.0, Dia.=5′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 23 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Oct. 16.18 UT: m1=10.7, Dia.=5′, DC=2 ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Oct. 03.84 UT: m1=10.3, Dia.=6′, DC=2 ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Altitude: 16 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 Sep. 15.08 UT: m1=15.0 CCD, Dia.=0.36′, DC=4/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)
2018 Sep. 01.87 UT: m1=10.5, Dia.=5′, DC=2, Tail= 0.3 deg. in PA: 10 deg. ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Observation made under better conditions than in my previous August estimates. It was possible to separate the faint tail from the coma for the m1 determination. Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Aug. 14.90 UT: m1=10.4, Dia.=7′, DC=1/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Faint tail difficult to separate from the coma. The bright magnitude estimate (10.4) is related to the 7′ observed width of the coma and tail. Altitude: 16 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Aug. 10.84 UT: m1=13.7 CCD, Dia.=0.60′, DC=4/, Tail= 1.8′ in PA: 359 deg. ... 0.20-m f/4 Schmidt-Newton + CCD ... Sergey Shurpakov (Observatory A98, Baran’, Belarus)
2018 Aug. 09.90 UT: m1=10.7, Dia.=6′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Better observing conditions than in previous dates allowed to observe some extension of the faint tail, difficult to separate from the coma. The brighter magnitude estimate (10.7) is related to the 6′ observed width of the coma and tail. Altitude: 16 deg. Sidgwick method. Tycho-2 comparison stars. SQM : 21.2 ... 21.6 at zenith]
2018 Aug. 01.90 UT: m1=11.3, Dia.=2.5′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [End of astronomical twilight. Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0.]
2018 July 09.92 UT: m1=11.3, Dia.=2.5′, DC=27 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [End of astronomical twilight. Altitude: 17 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 June 16.90 UT: m1=11.7, Dia.=1.5′, DC=2 ... 20-cm T(80x) ... Carlos Labordena (Castellón, España)
2018 June 12.93 UT: m1=11.5, Dia.=2′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1. Altitude: 15 deg.]
2018 May  15.90 UT: m1=11.3, Dia.=2′, DC=2/ ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.9. Zodiacal light. Altitude: 22 deg.]
2018 May  11.87 UT: m1=11.8, Dia.=1.5′, DC=2, no tail ... 20-cm SCT(80x) ... Carlos Labordena (Castellón, España)
2018 May  08.90 UT: m1=11.1, Dia.=2.5′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.9. Zodiacal light. Altitude: 24 deg.]
2018 May  04.92 UT: m1=11.2, Dia.=2.2′, DC=2 ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.9. Zodiacal light. Observation made under better conditions, from a higher mountain location, providing a wider coma diameter and brighter m1 estimate in comparison with my previous Apr. 18.94 UT observation]
2018 May  04.48 UT: m1=13.2, Dia.=0.6′, DC=2 ... 40.0-cm L f/4.5 (257x) ... Seiichi Yoshida (Gunma, Japan)
2018 May  03.50 UT: m1=13.1, Dia.=0.9′, DC=3/ ... 40.0-cm L f/4.5 (257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Apr. 19.84 UT: m1=11.2, Dia.=3.0′, DC=3 ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 18.94 UT: m1=11.5, Dia.=1.5′, DC=3 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. Alt. 1490 m, 42º 54′ N, 5º 49′ W) [Zodiacal light. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Apr. 18.84 UT: m1=11.2, Dia.=2.9′, DC=3 ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 17.84 UT: m1=11.2, Dia.=3.0′, DC=3/ ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 15.81 UT: m1=11.0, Dia.=3.5′, DC=3/ ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 06.81 UT: m1=13.3, Dia.=1.3′, DC=3 ... 60-cm reflector (244x) ... Sandor Szabo (Sopron, Hungary)
2018 Apr. 05.86 UT: m1=10.5, Dia.=4′, DC=2/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Trichero – Soto y Amio, Leon, Spain. Alt. 1190 m , 42º 46′ N, 5º 53′ W) [Sidgwick method. Tycho-2 comparison stars. SQM : 21.0]
2018 Mar. 20.86 UT: m1=11.2, Dia.=2.5′, DC=3 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Villacintor, Leon, Spain. Alt. 930 m, 42º 29′ N, 5º 11′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Mar. 18.41 UT: m1=12.4, Dia,=1.3’, DC=2/3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 8.6°. Poor seeing, diffuse and difficult to observe. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Mar. 15.81 UT: m1=11.0, Dia.=3.5′, DC=3/ ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Mar. 12.82 UT: m1=11.5, Dia.=2′, DC=3, no tail ... 20-cm SCT(80x) ... Carlos Labordena (Castellón, España)
2018 Mar. 12.43 UT: m1=11.6:, Dia.=1.5′, DC=3 ... 40.0-cm L f/4.5 (75x) ... Seiichi Yoshida (Ibaraki, Japan)
2018 Mar. 11.41 UT: m1=11.6, Dia.=3’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 11.5°. No enhancement in Swan Band filter. Poor seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Mar. 08.75 UT: m1=10.8, Dia.=5.0′, DC=3 ... 10-cm B(40x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Mar. 05.79 UT: m1=11.0, Dia.=2.5, DC=2/ ... 25.4-cm L f:5 (104x) ... Maik Meyer (Limburg, Germany)
2018 Feb. 17.83 UT: m1=10.5, Dia.=4′, DC=3 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto de la Garandilla – Escuredo, Leon, Spain. Alt. 1140 m, 42º 42′ N, 5º 55′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Feb. 15.81 UT: m1=12.2, Dia.=2.0′, DC=3 ... 30.5-cm L f:5.0 (94x) ... J. P. Navarro Pina (Sierra de Carrascoy, Murcia, Spain) [NLm=5.5]
2018 Feb. 15.71 UT: m1=11.8, Dia.=1.5′, DC=3 ... 25-cm (150x) ... Danil Sidorko (Korenovsk, Russia)
2018 Feb. 15.71 UT: m1=12.5 CCD, Dia.=0.8′, DC=3, Tail= 3.1′ in PA: 81 deg. ... 20-cm L + CCD ... Danil Sidorko (Korenovsk, Russia)
2018 Feb. 12.84 UT: m1=10.5, Dia.=4′, DC=3 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Collada de la Cobertoria, Asturias, Spain. Alt. 1180 m, 43º 09′ N, 5º 54′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.8. It is difficult to separate the contribution of the inner ion tail from that of the coma to the total magnitude m1]
2018 Feb. 10.86 UT: m1=11.6, Dia.=2′, DC=2, no tail ... 20-cm SCT (80x) ... Carlos Labordena (Castellón, España)
2018 Feb. 10.43 UT: m1=12.1, Dia.=2.5’, DC=3/4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma opaque in centre, interference by stars in coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Feb. 08.44 UT: m1=11.6, Dia.=2.5’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, traced to 4’ in length in P.A. 094°. Opaque oval shaped inner coma. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 07.44 UT: m1=11.9, Dia.=2.7’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to an opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 06.45 UT: m1=11.4, Dia.=4.8’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 05.45 UT: m1=11.1, Dia.=4.2’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse coma, faint background stars within coma. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 04.98 UT: m1=11.0, Dia.=2′, DC=2 ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Jan. 22.50 UT: m1=11.3, Dia.=3.6’, DC=3/4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Opaque centre, diffuse outer coma. Slight moonlight interference. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 20.44 UT: m1=11.2, Dia.=5.7’, DC=4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to stars, does not enhance in Swan Band filter. Inner coma elongated to the East approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 19.87 UT: m1=11.0, Dia.=1.7′, DC=5 ... 60-cm L (187x) ... Sandor Szabo (Hungary) [Long Tail= 13’ is visible to PA: 100 deg.]
2018 Jan. 19.47 UT: m1=11.3, Dia.=3.8’, DC=3/4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Close to stars, slight interference. Inner coma elongated to the East approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 18.87 UT: m1=10.8, Dia.=4′, DC=2, no tail ... 20-cm SCT (80x) ... Carlos Labordena (Castellón, España)
2018 Jan. 17.92 UT: m1=10.0, Dia.=5′, DC=2/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. Alt. 1350 m, 42º 54′ N, 5º 50′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Jan. 17.79 UT: m1=11.0, Dia.=1.6′, DC=3 ... 25.4-cm L f:5 (104x) ... Maik Meyer (Limburg, Germany)
2018 Jan. 17.45 UT: m1=11.4, Dia.=4’, DC=4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. close to faint stars, slight interference. Inner coma elongated to the East approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 16.77 UT: m1=11.9, Dia.=3.0′, DC=2 ... 30.5-cm L f:5 (150x) ... J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain)
2018 Jan. 16.45 UT: m1=11.3, Dia.=5.5’, DC=3/4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Bright star in coma, opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 15.46 UT: m1=11.3, Dia.=3.9’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma elongated to the East approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 14.77 UT: m1=10.9, Dia.=1.5, DC=3 ... 25.4-cm L f:5 (104x) ... Maik Meyer (Limburg, Germany)
2018 Jan. 14.45 UT: m1=11.2, Dia.=4.8’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [No enhancement in Swan Band filter. Short broad tail visible 6.3’ in length in P.A. 090° approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 12.43 UT: m1=11.0, Dia.=4.8’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 10.87 UT: m1=11.5, Dia.=2′, DC=3, no tail ... 20-cm SCT (117x) ... Carlos Labordena (Castellón, España)
2018 Jan. 10.77 UT: m1=11.5, Dia.=2.0′, DC=3 ... 30.5-cm L (97x) ... J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain)
2018 Jan. 08.92 UT: m1=10.0, Dia.=5′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Valdespino Cerón, Leon, Spain. Alt. 830 m, 42º 15′ N, 5º 22′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Jan. 07.83 UT: m1=11.0 CCD, Dia.=0.55′, DC=6/, Tail=8′ in PA=89.4 deg. ... 0.25-m L f/4.7 + CCD ... Sergey Shurpakov (C36, Baran’, Belarus)
2018 Jan. 07.76 UT: m1=10.5, Dia.=4′, DC=3 ... 11.4-cm L f/6 (45x) ... Neil Norman FRAS (Ipswich, England)
2018 Jan. 06.771 UT: m1=10.5, Dia=5′, DC=4 ... 11.4l-cm L f/6 (45x) ... Neil Norman FRAS (Ipswich, England)
2018 Jan. 06.48 UT: m1=11.1, Dia.=2.6′, DC=5 ... 40.0-cm L f/4.5 (75x) ... Seiichi Yoshida (Ibaraki, Japan)
2018 Jan. 05.45 UT: m1=10.7, Dia.=7’, DC=4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Opaque centre, semi-transparent outer coma. Slight interference by mag 3.7 star, 13.5’ away to the NE. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 04.787 UT: m1=10.5, Dia.=2′, DC=2 ... 11.4-cm L f/6 (45x) ... Neil Norman FRAS (Ipswich, England)
2018 Jan. 03.771 UT: m1=10.7, Dia.=1.5′, DC=2 ... 11.4-cm L f/6 (45x) ... Neil Norman FRAS (Ipswich, England)

C/2016 N6 (PANSTARRS) 
2018 Dec. 31.64 UT: m1=11.9, Dia.=1.5′, DC=4 ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Ibaraki, Japan)
2018 Dec. 28.47 UT: m1=13.0, Dia.=1.3’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Sometimes faintly stellar, diffuse outer coma, close to star. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Dec. 27.47 UT: m1=12.3, Dia.=1.3’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, difficult due to busy star field. No enhancement in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Dec. 14.08 UT: m1=11.5, Dia.=2.5′, DC=3 ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Alto del Trichero – Soto y Amio, Leon, Spain. Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Sidgwick method. APASS comparison stars. SQM: 21.0]
2018 Dec. 09.27 UT: m1=12.3, Dia.=1′, DC=3 ... 22-cm L(160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 01.76 UT: m1=12.6, Dia.=1.1′, DC=3 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 30.67 UT: m1=12.3, Dia.=1.0′, DC=3/ ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 29.51 UT: m1=12.6, Dia.=2’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse, weakly condensed. Low altitude= 10.0°. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Nov. 14.08 UT: m1=13.2, Dia.=0.7′, DC=6 ... 60-cm L(187x) ... Sandor Szabo (Sopron, Hungary)
2018 Nov. 11.71 UT: m1=13.0, Dia.=1.2’, DC=3/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Small and very diffuse, moderately condensed centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Nov. 10.66 UT: m1=13.0, Dia.=1.3’, DC=3/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Sometimes appears stellar. Diffuse and evenly illuminated coma with a slightly brighter central condensation. No enhancement in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Nov. 05.09 UT: m1=12.8, Dia.=1′, DC=2/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [metod S, Lm=6.48]
2018 Nov. 03.75 UT: m1=11.9, Dia.=1.9′, DC=5 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 21.07 UT: m1=12.3, Dia.=1′, DC=3/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.75]
2018 Oct. 20.19 UT: m1=11.8, Dia.=2.5′, DC=3 ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. SQM: 21.0]
2018 Oct. 17.08 UT: m1=12.6, Dia.=1′, DC=2/ ... 25.4-cm L(190.5x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, green zone]
2018 Oct. 13.07 UT: m1=13.5 CCD, Dia.=0.45′, DC=7/ ... 0.20-m f/4 Schmidt-Newton + CCD ... S. Shurpakov (Observatory A98, Belarus)
2018 Oct. 07.73 UT: m1=13.2, Dia.=0.8′, DC=5/ ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 06.78 UT: m1=12.9, Dia.=0.8′, DC=6 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 June 12.95 UT: m1=11.7, Dia.=1.5′, DC=4 ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. APASS comparison stars. SQM: 21.1. Altitude: 14 deg.]
2018 May  15.97 UT: m1=11.6, Dia.=2.0′, DC=4 ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 May  08.92 UT: m1=11.8, Dia.=1.7′, DC=5 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. APASS comparison stars. SQM: 21.2]
2018 May  08.89 UT: m1=12.2, Dia.=1.5′, DC=4/ ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia)
2018 May  06.85 UT: m1=12.7, Dia.=2.0′, DC=6 ... 30.5-cm L (94x) ... J. P. Navarro Pina (Puerto de la Cadena, Murcia, España)
2018 May  04.90 UT: m1=11.9, Dia.=1.2′, DC=5 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 May  04.57 UT: m1=12.7, Dia.=1.1′, DC=5 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 May  03.51 UT: m1=12.3, Dia.=1.4′, DC=5 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Apr. 19.86 UT: m1=12.5, Dia.=0.9′, DC=4 ... 20-cm L f:4 (106x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 18.89 UT: m1=12.1, Dia.=1.0′, DC=5 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. Alt. 1490 m, 42º 54′ N, 5º 49′ W) [Sidgwick method. APASS comparison stars. SQM: 21.0]
2018 Apr. 18.86 UT: m1=12.5, Dia.=1.1′, DC=4/ ... 20-cm L f:4 (106x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 17.86 UT: m1=12.5, Dia.=1.0′, DC=4 ... 20-cm L f:4 (106x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 08.93 UT: m1=12.6, Dia.=1′, DC=2 ... 25-cm L(105x) ... Valentín Díaz (La Romaneta, Alicante, España)
2018 Apr. 06.87 UT: m1=12.8, Dia.=1.5′, DC=6 ... 60-cm reflector (187x) ... Sandor Szabo (Sopron, Hungary)
2018 Apr. 05.90 UT: m1=12.0, Dia.=1.2′, DC=5 ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Alto del Trichero – Soto y Amio, Leon, Spain. Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Sidgwick method. APASS comparison stars. SQM: 21.5]
2018 Mar. 20.89 UT: m1=12.0, Dia.=1.2′, DC=5 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Villacintor, Leon, Spain. Alt. 930 m, 42º 29′ N, 5º 11′ W) [Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 Mar. 12.45 UT: m1=12.7, Dia.=1.1′, DC=6 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Ibaraki, Japan)
2018 Feb. 17.86 UT: m1=12.1, Dia.=1.2′, DC=5 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto de la Garandilla – Escuredo, Leon, Spain. Alt. 1140 m, 42º 42′ N, 5º 55′ W) [Sidgwick method. APASS comparison stars. SQM: 21.0. Field stars checked in DSS]

C/2016 M1 (PANSTARRS) 
2018 Dec. 29.45 UT: m1=10.6, Dia.=4.0’, DC=4/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Small opaque centre, fading to edges. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Dec. 28.45 UT: m1=10.4, Dia.=3.8’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to star, moderately condensed opaque centre, transparent outer coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Dec. 27.46 UT: m1=10.8, Dia.=3.5’, DC=3 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Slight interference from faint background stars, dims slightly in Swan band filter. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Dec. 07.43 UT: m1=10.6, Dia.=3.7’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to stars. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Nov. 29.47 UT: m1=10.5, Dia-=3.4’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre with faint stellaring visible in good seeing. Low altitude= 18.8°. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Nov. 26.44 UT: m1=10.8, Dia.=3’, DC=6 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint stellar pseudo-nucleus. Diffuse semi-transparent inner coma fades to transparent outer coma. Low altitude= 19.2°. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Nov. 11.69 UT: m1=10.7, Dia.=3.2’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, inner coma moderately condensed. Dims slightly in Swan Band. Low altitude= 16.9°. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Nov. 10.65 UT: m1=10.6, Dia.=2.5’, DC=4/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, central condensation moderately condensed. Semi-transparent outer coma. Dims slightly in Swan Band filter.Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 08.46 UT: m1=10.5, Dia.=3.2’, DC=3 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to star. Outer coma tenuous with an opaque but weakly condensed centre. Low altitude = 14.8°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 03.39 UT: m1=10.4, Dia.=1.7’, DC=3/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to faint stars, moderately condensed and opaque centre surrounded by semi-transparent haze. Slight twilight interference. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Oct. 30.40 UT: m1=10.3, Dia.=3.8’, DC=3 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Star in coma, coma centre opaque. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Oct. 29.43 UT: m1=10.4, Dia.=3.8’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 17.7°. Small opaque centre, moderately condensed, diffuse outer coma.Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Oct. 27.39 UT m1=10.5, Dia.=2.8’, DC=3 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances slightly in Swan Band filter. Diffuse coma, opaque centre but weakly condensed. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Oct. 19.40 UT: m1=11.1, Dia.=1.7’, DC=6 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight. Very diffuse outer coma, small and well condensed opaque inner coma, stellar central condensation. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Oct. 12.94 UT: m1=10.3, Dia.=2.5′, DC=4 ... 22-cm L(160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 08.41 UT: m1=10.2, Dia.=2.3’, DC=4/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, enhances in Swan Band filter. Moderately condensed centre. Busy star field, visible at x39 but best with x83. Poor seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Oct. 01.40 UT: m1=10.2, Dia.=2.8’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, semi-transparent. Moderately condensed opaque inner coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 27.38 UT: m1=10.5, Dia.=2.5’, DC=4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma centre moderately condensed and opaque, fading to edges. Enhances in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 10.38 UT: m1=9.8, Dia.=3.5’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Sky slightly hazy with dust/smoke in upper atmosphere. No tail. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Sep. 09.94 UT: m1=10.1, Dia.=3′, DC=4 ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Sep. 09.40 UT: m1=9.6, Dia.=4.9’, DC=4/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Cooma enhances in Swan Band filter. Faint outer coma, gradually brightens to a well condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Sep. 08.38 UT: m1=9.7, Dia.=4.8’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse outer coma, opaque centre, sometimes stellar. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Sep. 07.40 UT: m1=9.8, Dia.=3.2’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to star pairing on edge of coma, coma enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Sep. 05.52 UT: m1=9.7, Dia.=3 ... 25×100 B ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Aug. 29.37 UT: m1=9.8, Dia.=2.9’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint stars on NE edge of coma, enhances well in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Aug. 15.06 UT: m1=9.0, Dia.=4′, DC=4 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [method S]
2018 Aug. 14.47 UT: m1=9.1, Dia.=6’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Transparent outer coma, brightening to a well condensed opaque centre, pale-aqua blue in colour. Faintly stellar in periods of good seeing. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Aug. 13.37 UT: m1=9.1, Dia.=3.8’, DC=5 ... 25-cm L f:5(x39) ... Chris Wyatt (Walcha, NSW, Australia) [Star on the Western edge of coma. Faint, short tail to the East approximately. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Aug. 11.21 UT: m1=9.0, Dia.=4’, DC=3 ... 29-cm SCT(87.5x) ... Alberto Anunziato (Oro Verde, Argentina) [Mét. Sidgwick, Cat. Tycho II]
2018 Aug. 10.08 UT: m1=9.0, Dia.=4′, DC=5 ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Method: S]
2018 Aug. 10.07 UT: m1=8.9, Dia.=4′, DC=4/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Method: S]
2018 Aug. 08.38 UT: m1=8.7 ... Dia.=5.4’, DC=5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint stars in coma, well condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Aug. 06.58 UT: m1=8.8 ... Dia.=6’, DC=5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Short, faint broad tail visible, traced to 5’ in length in P.A. 098°. Large transparent outer coma gradually brightening to a well condensed centre. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Aug. 02.36 UT: m1=8.9, Dia.=6.9’, DC=6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faintly stellar, opaque inner coma, transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Aug. 01.36 UT: m1=8.8:, Dia.=5.1’, DC=5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain due to interference by star in coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Aug. 01.35 UT: m1=8.9, Dia.=4 ... 25×100 B ... 25×100 B ... David A. J. Seargent (Cowra, NSW, Australia) [Marginally enhanced through Swan Band filter]
2018 July 30.36 UT: m1=8.7, Dia.=4.8’, DC=5/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma appears elongated to the East approximately, coma centre well condensed, opaque, pale aqua-blue in colour and sometimes appears stellar in good seeing. Enhances slightly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 July 20.72 UT: m1=8.6, Dia.=5’, DC=5/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Short, faint broad tail visible to the East approximately. Low altitude = 15.2°. Comparison stars checked using Tycho-2 data in Guide 9.0. Method= M. Cat= TK]
2018 July 20.17 UT: m1= 8.8, Dia.=6′, DC=4 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 July 18.72 UT: m1=9.1, Dia.=3.5’, DC=5/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint star in coma. Coma diffuse, semi-transparent inner coma. Faint broad tail visible, traced to 6.3’ in length in P.A. 040°. Low altitude= 16.0°. Comparison stars checked using Tycho-2 data in Guide 9.0. Method= M. Cat= TK]
2018 July 16.42 UT: m1=9.0, Dia.=3.5’ ... DC=5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Busy star field, close to stars. Transparent outer coma, opaque inner coma. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 July 15.97 UT: m1=8.8, Dia.=3′, DC=5 ... 10-cm-R f/5 (34x) ... Willian Souza (Sao Paulo, Brazil)
2018 July 15.14 UT: m1=8.7, Dia.=6′, DC=4/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 July 13.71 UT: m1=8.7, Dia.=3.5’, DC=6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, small faint stellar centre, faint star in coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 July 12.47 UT: m1=8.7, Dia.=5.4’, DC=6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Short, broad transparent tail visible to NE approximately. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 July 11.73 UT: m1=8.7, Dia.=5.1’, DC=5/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, opaque centre, well condensed, appears faintly stellar in good seeing. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 July 08.38 UT: m1=8.3, Dia.=5.6’, DC=5/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse at edges, brightening gradually to opaque centre, well condensed. Faint transparent and slightly curved tail visible, traced to 5’ in length in P.A. 040° approximately. Convex side to the East. Comparison stars checked using Tycho-2 data in Guide 9.0,,Method= M, Cat= TK]
2018 July 06.51 UT: m1=8.5, Dia.=5.3’, DC=5/ ... 25cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) {Faint, broad transparent tail visible, traced to 5’ in length in P.A.045° approximately. Coma diffuse with well condensed opaque centre, faintly stellar in good seeing. Coma enhances slightly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK}
2018 July 06.12 UT: m1=8.4, Dia.=6′, DC=4/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 July 04.50 UT: m1=9.0, Dia.=4.0′, DC=4 ... 25×100 B ... David A. J. Seargent (Cowra, NSW, Australia) [Possibly slightly fainter using Swan Band filter. Appeared a little less condensed through filter]
2018 July 04.36 UT: m1=8.5, Dia.=4.8’, DC=5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint, broad transparent tail visible, traced to 6’ in length in P.A.030° approximately. Well condensed centre, pale-aqua blue in colour. Enhances slightly in Swan Band filter. Globular cluster NGC 6352 in field. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 July 04.06 UT: m1=8.5, Dia.=6′, DC=4 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 June 23.74 UT: m1=8.6, Dia.=6’, DC=6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) ]Broad faint tail visible, traced to 4.7’ in length in P.A. 348° approximately. Stellar central condensation, opaque centre. Observed from 1250m altitude, SQM reading of 21.8 taken as an average over 5 readings near zenith. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 June 22.74 UT: m1=8.7, Dia.=4.2’, DC=6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, 6.4’ in length in P.A. 0.3° approximately. Slight interference from field star. Faint stellar central condensation, opaque centre. Enhances in Swan Band filter, pale aqua-blue in colour. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 June 22.05 UT: m1=8.9, Dia.=3′, DC=5 ... 9cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil) [moonlight]
2018 June 21.06 UT: m1=8.9, Dia.=4′, DC=4 ... 9cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 June 19.05 UT: m1=7.7, Dia.=10′, DC=3 ... 10×50 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 10 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.8. Observation made under better conditions, from a higher mountain location, providing a wider coma diameter and brighter m1 estimates in comparison with my previous June 13 observation]
2018 June 19.05 UT: m1=7.9, Dia.=8′, DC=3/ ... 25×100 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain)
2018 June 19.05 UT: m1=8.3, Dia.=6′, DC=4, Tail= 0.3 deg. in PA: 350 deg. ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain)
2018 June 19.05 UT: m1=8.6, Dia.=6′, DC=4/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 June 19.02 UT: m1=8.4, Dia.=4′, DC=3/ ... 25-cm L F/4.5 (66x) ... Gonzalo Vargas (Cochabamba, Bolivia) [Observation with some Moon light interference]
2018 June 18.05 UT: m1=8.7, Dia.=5′, DC=4/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 June 17.04 UT: m1=8.7, Dia.=4′, DC=3 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 June 16.96 UT: m1=8.7, Dia.=3.9′, DC=5 ... 25-cm L(65x) ... Valentín Díaz (Puebla de Don Fadrique, Granada, España)
2018 June 16.03 UT: m1=8.8, Dia.=4.5′, DC=4/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 June 15.95 UT: m1=8.5, Dia.=5′, DC=6 ... 30.5-cm L F/5.0 (94x) ... J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain) [h=8º comet low horizont , corrected magnitude by atmospheric extinction NeLM=5.7]
2018 June 14.07 UT: m1=8.9, Dia.=3′, DC=4 ... 9cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 June 13.72 UT: m1=8.8, Dia.=5.4’, DC=5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint transparent tail visible 5.9’ in length in P.A. 322° approximately. Well condensed centre pale aqua-blue in colour, not quite stellar. Coma enhances in Swan Band filter. Faintly visible in 7×50 binoculars. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 June 13.06 UT: m1=8.3, Dia.=6′, DC=3/ ... 25×100 B ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Altitude: 14 deg. In 20-cm SCT (77x) : m1=8.8, Dia.=4′, DC=3/. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 June 12.71 UT: m1=8.8, Dia.=6’, DC=5/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Outer coma slightly enhances and inner coma dims using Swan Band filter. Opaque well condensed centre, appears pale aqua in colour. Faint stars in coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 June 10.36 UT: m1=8.9, Dia.=4′, DC=5 ... 30×125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 June 10.05 UT: m1=9.0, Dia.=2′, DC=5 ... 9cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 June 09.03 UT: m1=9.0, Dia.=2′, DC=5 ... 9cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 June 09.01 UT: m1=9.0, Dia.=4′, DC=3 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 June 08.35 UT: m1=9.3, Dia.=4′, DC=5 ... 30×125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 June 08.33 UT: m1=8.9, Dia.=3′, DC=5 ... 9cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 June 07.05 UT: m1=9.0, Dia.=2′, DC=5 ... 9cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil) [close to star TYC 6885-1224-1]
2018 June 06.32 UT: m1=9.0, Dia.=4′, DC=5 ... 30×125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 June 06.07 UT: m1=9.1, Dia.=4′, DC=4 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 June 04.44 UT: m1=8.9, Dia.=3.3’, DC=4/5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Outer coma extended to the West approximately, faint star in coma. Opaque, moderately condensed centre. At x83 the centre appears stellar. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 June 04.27 UT: m1=9.0, Dia.=4′, DC=4 ... 30×125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 June 04.05 UT: m1=9.0: ... 9-cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil) [close to star TYC 6882-2034-1]
2018 May  30.14 UT: m1=9.5: ... 9-cmm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil) [moonlight]
2018 May  29.36 UT: m1=9.6:, DC=4 ... 9-cmm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil) [moonlight]
2018 May  28.36 UT: m1=9.5, Dia.=2′, DC=5 ... 9-cmm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 May  27.46 UT: m1=9.4, Dia.=3′, DC=4 ... 30×125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 May  27.36 UT: m1=9.6, Dia.=1′, DC=5 ... 9-cmm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 May  25.72 UT: m1=9.6:, Dia.=2.9’, DC=5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain due to interference by mag 10.2 star near centre of coma. Comparison stars checked Tycho-2 Guide 9.0, Method= M, Cat= TK]
2018 May  25.28 UT: m1=9.4, Dia.=2.4’, DC=4 ... 25-cm L f:4.5 (75x) ... Gonzalo Vargas (Cochabamba, Bolivia) [Se observó ligera coloración verde agua de la coma, se experimentó alguna interferencia de luz de la Luna, se usaron las estrellas SAO 188147 (8.6) y GSC 63051137 (9.6) para estimar magnitud del cometa, se usó método de desenfoque]
2018 May  24.46 UT: m1=9.1, Dia.=4′, DC=4 ... 30×125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 May  24.36 UT: m1=9.8, Dia.=1′, DC=5 ... 9-cmm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 May  22.72 UT: m1=9.6, Dia.=4.2’, DC=5/6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, pale-aqua blue opaque centre. Coma enhances in Swan Band filter, inner coma dims. Comparison stars checked Tycho-2 Guide 9.0, Method= M, Cat= TK]
2018 May  22.46 UT: m1=9.1, Dia.=3′, DC=5 ... 30×125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 May  22.36 UT: m1=9.8, Dia.=1′.5, DC=5 ... 9-cmm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil) [close to star TYC 6302-2472-1]
2018 May  21.72 UT: m1=10.0, Dia.=5’, DC=5/6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to stars, centre opaque, faintly stellar. Comparison stars checked Tycho-2 Guide 9.0, Method= M, Cat= TK]
2018 May  21.36 UT: m1=9.8:, Dia.=1′, DC=5/ ... 9-cmm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil) [close to star GSC 6302-1087]
2018 May  21.07 UT: m1=8.9, Dia.=5′, DC=3/ ... 25×100 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In 20-cm SCT (77x) : m1=9.1, Dia.=5′, DC=3. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 May  20.31 UT: m1=9.7, Dia.=4′, DC=4/ ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 May  20.09 UT: m1=9.6, Dia.=4′, DC=4, no tail ... 20-cm SCT(50x) ... Carlos Labordena (Castellón, España)
2018 May  19.72 UT: m1=10.2, Dia.=4.7’, DC=6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Semi-transparent outer coma, inner coma opaque with faint stellar central condensation. Outer coma enhances in Swan Band filter, inner coma disappears making the coma appear more uniform in brightness. Hint of dust tail within the coma extending to NW approximately. Comparison stars checked Tycho-2 Guide 9.0, Method= M, Cat= TK]
2018 May  18.73 UT: m1=10.2, Dia.=3.5’, DC=5 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to nearby stars ... Coma diffuse, slightly elongated to WSW approximately. Enhances in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  18.46 UT: m1=9.6, Dia.=3′, DC=4 ... 30×125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 May  16.02 UT: m1=9.0, Dia.=4′, DC=3 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.8]
2018 May  15.46 UT: m1=9.6, Dia.=4′, DC=5 ... 30×125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 May  15.24 UT: m1=9.8, Dia.=2.5’, DC=4 ... 25-cm L f:4.5 (75x) ... Gonzalo Vargas (Cochabamba, Bolivia) [Se nota coloración azulada de la coma, también se aprecia un ligero alargamiento de la coma al oeste, se usaron estrellas SAO 162817 (9.3) y GSC 5735817(10.8) para estimar magnitud del cometa]
2018 May  15.17 UT: m1=10.1:, Dia.=0′.5, DC=5 ... 9-cmm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 May  13.14 UT: m1=9.6, Dia.=4′, DC=4, no tail ... 20-cm SCT(50x) ... Carlos Labordena (Castellón, España)
2018 May  12.46 UT: m1=9.9:, Dia.=4′, DC=5 ... 30×125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 May  10.62 UT ... m1=10.0, Dia=3.2’, DC=6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Outer coma enhances in Swan Band filter, inner coma dims. Coma elongated to the West approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ}
2018 May  09.59 UT: m1=10.1, Dia.=4.7’, DC= 6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Transparent outer coma enhances in Swan band filter while the faintly stellar and opaque central condensation dims. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  09.17 UT: m1=10.6, Dia.=2.5′, DC=3 ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [little enhancement with comet filter ]
2018 May  09.09 UT: m1=9.3, Dia.=5′, DC=3 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. Tycho-2 comparison stars. SQM : 20.7. Before moonrise. Altitude: 24 deg.]
2018 May  08.00 UT: m1=10.4, Dia.=1′, DC=3 ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia)
2018 May  03.76 UT: m1=10.5, Dia.=1.7′, DC=4 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Apr. 22.27 UT: m1=10.8, Dia.=2′, DC=4 ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Apr. 20.69 UT: m1=10.5, Dia.=3.8’, DC=5/6 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances slightly in Swan Band filter. Central condensation sometimes appears stellar in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Apr. 20.09 UT: m1=10.5, Dia.=5.5′, DC=3/ ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 19.09 UT: m1=9.9, Dia.=4′, DC=3 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Apr. 19.08 UT: m1=10.5, Dia.=5.5′, DC=3 ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 18.08 UT: m1=10.6, Dia.=5.0′, DC=3/ ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 17.14 UT: m1=10.8, Dia.=2.5′, DC=3, no tail ... 20-cm SCT(80x) ... Carlos Labordena (Castellón, España)
2018 Apr. 16.73 UT: m1=11.2, Dia.=2.2’, DC=5/6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma does not appear to enhance in Swan Band filter. Diffuse outer coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Apr. 15.71 UT: m1=11.4, Dia.=2.7’, DC=5/6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma does not enhance in Swan Band filter. Opaque centre, moderately condensed, hints of stellaring in periods of good seeing, outer coma diffused and appears fanned to the North. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Apr. 14.67 UT: m1=11.6, Dia.=2’, DC=4/5 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma does not enhance in Swan Band filter, Inner coma opaque, moderately condensed, no tail. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Apr. 11.66 UT: m1=11.3, Dia.=2.3’, DC=4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, Inner coma opaque and moderately condensed. Does not appear to enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Mar. 27.17 UT: m1=11.1, Dia.=1.5′, DC=3, no tail ... 20-cm SCT(80x) ... Carlos Labordena (Castellón, España)
2018 Mar. 24.70 UT: m1=12.0, Dia.=1.3’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Interference from background stars, diffuse coma with opaque centre. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Mar. 24.33 UT: m1=11.3, Dia.=1.5′, DC=3 ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [near star with m1:11.47]
2018 Mar. 18.72 UT: m1=11.8 ... Dia.=1.3’, DC=5/6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter, coma diffuse with a small and opaque centre that is sometimes stellar in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Feb. 21.23 UT: m1=11.0, Dia.=3′, DC=2/ ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Villacintor, Leon, Spain. Alt. 930 m, 42º 29′ N, 5º 11′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1. Altitude: 24 deg.]

C/2016 A1 (PANSTARRS)  c2016a1_mag
2017 Dec. 13.98 UT: m1=16.7 CCD, Dia.=0.18′, DC=8 ... Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 26.85 UT: m1=16.2, Dia.=0.2′, DC=5 ... 60-cm L (407x) ... Sandor Szabo (Hungary) [Motion was checked]
2017 Feb. 25.88 UT: m1=16.7 CCD, Dia.=0.29′, DC=8/ ... 0.25-m f/4.7 reflector + CCD ... S. Shurpakov (Observatory C36, Baran’, Belarus)

C/2015 V2 (Johnson) C2015V2_Mag
2018 Jan. 17.44 UT: m1=12.9, Dia.=1.4’ ... DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, central condensation weak and opaque. Low altitude = 17.9°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 16.45 UT: m1=13.5, Dia.=1.6’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, low altitude = 17.0°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 14.45 UT: m1=13.0, Dia.=1.4’, DC=4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed opaque centre. Low altitude = 17.3°. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Jan. 05.44 UT: m1=13.5, Dia.=0.9’, DC=2/3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

C/2015 O1 (PANSTARRS)
2018 Nov. 14.15UT: m1=13.5, Dia.=0.7′, DC=1 ... 60-cm L(244x) ... Sandor Szabo (Sopron, Hungary)
2018 Nov. 03.76 UT: m1=[13.0, negative ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 13.89 UT: m1=13.5, Dia.=1.3′, DC=4 ... 60-cm L (244x) ... Sandor Szabo (Sopron, Hungary)
2018 July 13.49 UT: m1=12.8, Dia.=1.0′, DC=4 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 08.90 UT: m1=13.3, Dia.=0.7’, DC=2 ... 35-cm L (200x) ... Gábor Sánta (Göd, county Pest, Hungary) [h=29 deg., NELM= 4,0]
2018 May  15.99 UT: m1=12.0, Dia.=1.2′, DC=5 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. APASS comparison stars. SQM: 21.7]
2018 May  08.96 UT: m1=12.2, Dia.=1.2′, DC=5 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. APASS comparison stars. SQM: 21.6]
2018 May  04.94 UT: m1=12.2, Dia.=1.0′, DC=4 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. SQM: 21.5]
2018 May  04.50 UT: m1=13.1, Dia.=1.2′, DC=5 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 May  03.53 UT: m1=13.5, Dia.=0.8′, DC=4/ ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Apr. 19.85 UT: m1=12.8, Dia.=1.5′, DC=5 ... 20-cm L f:4 (106x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 18.91 UT: m1=12.3, Dia.=1.0′, DC=4 ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. Alt. 1490 m, 42º 54′ N, 5º 49′ W) [Sidgwick method. APASS comparison stars. SQM: 21.5]
2018 Apr. 18.85 UT: m1=12.8, Dia.=1.6′, DC=5 ... 20-cm L f:4 (106x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 17.85 UT: m1=12.7, Dia.=1.5′, DC=4/ ... 20-cm L f:4 (106x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 06.93 UT: m1=13.3, Dia.=0.9′, DC=5 ... 60-cm reflector (187x) ... Sandor Szabo (Sopron, Hungary)
2018 Apr. 05.89 UT: m1=12.2, Dia.=1.5′, DC=3/ ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Alto del Trichero – Soto y Amio, Leon, Spain. Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Sidgwick method. APASS comparison stars. SQM: 21.4]
2018 Mar. 24.74 UT: m1=13.5, Dia.=1.2’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 10.6°. Coma diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Mar. 12.80 UT: m1=12.8, Dia.=1.4′, DC=3 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Ibaraki, Japan)
2018 Mar. 05.03 UT: m1=13.6 CCD, Dia.=0.66′, DC=6/ ... 0.20-m L f/4 + CCD ... Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2018 Jan. 18.21 UT: m1=12.8, Dia.=1.2′, DC=5 ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. SQM: 21.3. Central condensation, m2=14.2: (APASS). Field stars checked in DSS]

C/2014 B1 (Schwartz) c2014b1_mag
2018 Apr. 06.88 UT: m1=[16.2, negative ... 60-cm reflector (407x) ... Sandor Szabo (Sopron, Hungary)

C/2010 U3 (Boattini)
2018 Apr. 06.84 UT: m1=16.0, Dia.=0.2′, DC=6 ... 60-cm reflector (407x) ... Sandor Szabo (Sopron, Hungary)

(944) Hidalgo 
2018 Nov. 30.66 UT: m1=14.3, Dia.=-, DC=9 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 03.79 UT: m1=14.0, Dia.=-, DC=9 ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 07.75 UT: m1=14.1, Dia.=-, DC=9 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 19.08 UT: m1=14.3, Dia.=–, DC=9 ... 20-cm SCT(200x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Asteroid (944) Hidalgo. Stellar appearance. Motion checked over a 45-min period. Comparison stars taken from SRO Henden photometry near IZ Aur. Limiting stellar magnitude fainter than 14.6 (HN). In-focus method. SQM: 21.4]
2018 Sep. 17.72 UT: m1=14.2, Dia.=-, DC=9 ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 16.75 UT: m1=[14.4, negative ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)

368P/NEAT = P/2005 R1 (NEAT) 
2018 Sep. 14.91 UT: m1=17.7 CCD, Dia.=0.33′, DC=3 ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)

364P/PANSTARRS 
2018 Oct. 03.95 UT: m1=11.0, Dia.=4′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Faint tail difficult to separate from the coma. The bright estimate (11.0) is related to the 4′ observed width of the coma and tail. Altitude: 25 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 Sep. 19.03 UT: m1=11.3, Dia.=3.5′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Faint tail difficult to separate from the coma. The magnitude estimate (11.3) is related to the 3.5′ observed width of the coma and tail. Altitude: 20 deg. Observation made under better conditions, providing a wider coma diameter and brighter magnitude estimate in comparison with my previous Sep. 10 observation. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Sep. 10.12 UT: m1=11.8, Dia.=2.7′, DC=2/ ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Faint tail difficult to separate from the coma. The magnitude estimate (11.8) is related to the 2.7′ observed width of the coma and tail. Altitude: 16 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2018 Aug. 18.75 UT: m1=13.6, Dia.=0.9’, DC=5/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult ... Diffuse with small opaque centre, sometimes stellar. Faint tail visible, traced to 1.7’ in length in P.A. 272°. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Aug. 15.77 UT: m1=14.0, Dia.=0.9’, DC=4 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, traced to 2’ in length in P.A. 244° approximately. Sometimes appears faintly stellar in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Aug. 11.27 UT: m1=12.6, Dia.=1′, DC=5 ... 22-cm L(160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Method S, report revised using ASAS 3 catalogue]
2018 Aug. 08.77 UT: m1=12.7, Dia.=1.1’, DC=5/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, traced to 4.4’ in length in P.A. 240° approximately. Centre appears faintly stellar in good seeing. Moonlight (Moon altitude = 3.1°, 9.8% illuminated). Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Aug. 06.64 UT: m1=13.2, Dia.=1.4’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faintly stellar, faint narrow tail visible and traced to 4’ in length in P.A. 247° approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 July 23.77 UT: m1=12.2, Dia.=0.8’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint narrow tail visible, slightly curved to the East. Tail traced to 5.5’ in length in P.A. 220°. Oval and opaque inner coma. Comparison stars checked using APASS data in Guide 9.0. Method= M. Cat= AQ]
2018 July 20.77 UT: m1=12.3, Dia.=0.9’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint narrow tail visible, slightly curved to the East. Tail traced to 4.4’ in length in P.A. 214°. Opaque oval shaped coma centre with stellar central condensation. Comparison stars checked using APASS data in Guide 9.0. Method= M. Cat= AQ]
2018 July 18.78 UT: m1=11.9, Dia.=1.0’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 17.8°. Faint tail visible, slightly curved to the East. Tail traced to 6.5’ in length in P.A. 199°. Opaque inner coma, oval in shape aligned with tail, stellar centre. No enhancement in Swan Band filter. Rapid motion noticeable. Comparison stars checked using APASS data in Guide 9.0. Method= M. Cat= AQ]
2018 July 16.78 UT: m1=11.5, Dia.=0.7’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 11.5°. Faint tail traced to 4.6’ in length in P.A. 198°. Coma dims in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 July 13.80 UT: m1=11.1, Dia.=1’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 7.6°. Faint tail visible 4.4’ in length in P.A. 186°, no enhancement in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 July 09.34 UT: m1=11.3, Dia.=0.8’, DC=5/ ... 25cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 8.1°. Faint tail visible, 3’ in length in P.A. 166° approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 July 08.36 UT: m1=11.0, Dia.=1.2’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Extremely low altitude = 5.0°, poor seeing. Faint tail visible, 3.6’ in length in P.A. 152° approximately. Rapid motion noticeable. Close to 11.8 mag star. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 July 04.34 UT: m1=11.3, Dia.=1’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint narrow tail visible, traced to 7’ in length in P.A. 151° approximately ... Low altitude = 15.1°, slight twilight interference. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 23.35 UT: m1=11.9, Dia.=1.4’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight ... Faint tail visible, traced to 2.7’ in length in P.A. 089°. Slight interference from glare of mag 6.4 star in field. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 22.35 UT: m1=11.9, Dia.=0.9’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight ... Faint tail visible, traced to 2.2’ in length in P.A. 118° approximately. Stellar central condensation, diffuse outer coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 14.35 UT: m1=12.8, Dia.=0.9’ ... DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, traced to 2.3’ in length in P.A. 110°. Stellar central condensation in good seeing. Visible faintly at x39 with no enhancement in Swan Band filter at this magnification. Slight zodiacal light interference. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 12.35 UT: m1=13.1, Dia.=1.5’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, faint stellar central condensation. Faint coma extension to the ESE approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 11.35 UT: m1=13.1, Dia.=1.1’, DC=5/6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, stellar central condensation in periods of good seeing. Does not enhance in Swan Band filter. Coma elongated to the East approximately, just barely visible at x39. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 07.35 UT: m1=13.2, Dia.=0.7’, DC=5/6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with stellar central condensation visible in periods of good seeing. Slight zodiacal light and glare from Venus interference. Does not enhance in Swan Band filter. At x166 the coma appears more fanned to the ESE approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]

217P/LINEAR 
2018 Jan. 08.95 UT: m1=16.8 CCD, Dia.=0.26′, DC=6/ ... 0.25-m L f/4.7 + CCD ... Sergey Shurpakov (C36, Baran’, Belarus)
2018 Jan. 07.95 UT: m1=17.2 CCD, Dia.=0.26′, DC=7 ... 0.25-m L f/4.7 + CCD ... Sergey Shurpakov (C36, Baran’, Belarus)

185P/Petriew 
2018 Mar. 18.41 UT: m1=13.2, Dia.=1.2’, DC=2 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 15.8°. poor seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Mar. 12.42 UT: m1=12.5:, Dia.=1.3′, DC=1 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Ibaraki, Japan)
2018 Mar. 11.42 UT: m1=12.5, Dia.=1.4’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 13.0°. Does not enhance in Swan Band filter. Slight zodiacal light interference, poor seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ)
2018 Feb. 17.82 UT: m1=10.4, Dia.=3′, DC=2/ ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto de la Garandilla – Escuredo, Leon, Spain. Alt. 1140 m, 42º 42′ N, 5º 55′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.6. Altitude: 24 deg. Zodiacal light. Mountain location, very clear sky down to the horizon]
2018 Feb. 10.42 UT: m1=11.7, Dia.=1.7’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 12.0°, zodiacal light interference ... Does not enhance in Swan Band filter, opaque centre, weakly condensed. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 07.42 UT: m1=11.7, Dia.=1.7’, DC=2/3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 10.1°. Coma diffuse with a slightly brighter but opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 06.42 UT: m1=11.7, Dia.=2.2’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 10.0°. Zodiacal light interference. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Feb. 05.42 UT: m1=12.0, Dia.=1.8’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 11.2°. Does not enhance in Swan Band filter, diffuse coma with slight brightening to centre. Faintly visible at x39. Zodiacal light interference, end of nautical twilight. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 17.81 UT: m1=10.7, Dia.=2.5′, DC=3 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. Alt. 1350 m, 42º 54′ N, 5º 50′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.8. Motion checked over a 30-min period. Field stars checked in DSS. Altitude: 16 deg. Zodiacal light. Mountain location, very clear sky down to the horizon]

174P/Echeclus  174P_Mag
2018 Jan. 19.89 UT: m1=14.6, Dia.=0.8′, DC=1 ... 60-cm L (305x) ... Sandor Szabo (Hungary)
2017 Dec. 23.58 UT: m1=13.8, Dia.=1’, DC=2 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

137P/Shoemaker-Levy 2 
2018 Aug. 12.02 UT: m1=16.0, Dia.=0.17′, DC=0 ... 0.60-m f/4 L(517x) ... Gabor Santa (Tarján, Hungary) [h=34 deg.]

78P/Gehrels 2 
2018 Nov. 30.38 UT: m1=[13.8 ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 07.44 UT: m1=14.1, Dia.=0.6′, DC=2 ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 06.82 UT: m1=15.6 CCD, Dia.=0.26′, DC=4 ... 0.25-m f/4.7 Newton + CCD ... S. Shurpakov (Observatory C36, Belarus)
2018 Sep. 17.66 UT: m1=[13.8, neegative ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 14.95 UT: m1=16.0 CCD, Dia.=0.39′, DC=8 ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)

74P/Smirnova-Chernykh 74p_mag
2018 Apr. 07.86 UT: m1=16.0 CCD, Dia.=0.38′, DC=7/ ... 0.25-m f/4.7 reflector + CCD ... Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2018 Apr. 06.95 UT: m1=16.0, Dia.=0.35′, DC=3 ... 60-cm reflector (407x) ... Sandor Szabo (Sopron, Hungary)

66P/du Toit 
2018 Aug. 20.13 UT: m1=11.5, Dia.=5′, DC=1/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [ Faint tail difficult to separate from the coma. The bright estimate (11.5) is related to the 5′ observed width of the coma and tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Aug. 15.74 UT: m1=13.8, Dia.=1.5’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult to see, very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 12.04 UT: m1=13.5, Dia.=1′, DC=0 ... 0.60-m f/4 L(244x) ... Gabor Santa (Tarján, Hungary) [very diffuse, h= 23deg.]
2018 Aug. 08.75 UT: m1=13.8, Dia.=1.7’, DC=1/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult due to glare from nearby 6.2 mag star in field, observed in periods of good seeing with bright star just out of field. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 06.63 UT: m1=13.0, Dia.=2.6’, DC=2 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 23.75 UT: m1=13.6, Dia.=1.8’, DC=2 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, difficult. Comparison stars checked using APASS data in Guide 9.0. Method= S. Cat= AQ]
2018 July 22.13 UT: m1=10.0, Dia.=4′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Quintanilla de los Oteros, Leon, Spain. Alt. 860 m, 42º 19′ N, 5º 24′ W) [Beginning of astronomical twilight. Altitude: 19 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 July 18.77 UT: m1=12.0, Dia.=4’, DC=2 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Enhances slightly in Swan Band filter. Very diffuse. Comparison stars checked using APASS data in Guide 9.0. Method= S. Cat= AQ]
2018 July 18.12 UT: m1=9.9, Dia.=4′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Beginning of astronomical twilight. Altitude: 16 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 July 15.12 UT: m1=11.7, Dia.=2′, DC=2 ... 20-cm T(80x) ... Carlos Labordena (Castellón, España) [no tail]
2018 July 11.76 UT: m1=12.3, Dia.=2.3’, DC=1 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, weakly condensed, close to mag 12.5 star. Faintly visible at x39 as a diffuse patch. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 10.12 UT: m1=9.7, Dia.=5′, DC=2/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Beginning of astronomical twilight. Altitude: 11 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 July 09.66 UT: m1=12.7, Dia.=2.1’, DC=2/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse and weakly condensed. Barely visible at x39. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 June 23.75 UT: m1=11.1, Dia.=7’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Enhances in Swan Band filter, coma diffuse, weakly condensed centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 June 22.76 UT: m1=11.1, Dia.=5.1’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Enhances slightly in Swan Band filter. Very diffuse, minimal interference from nearby bright stars. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 June 16.33 UT: m1=11.2, Dia.=2′, DC=2/ ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 June 13.77 UT: m1=10.8, Dia.=6.3’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, weakly condensed opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 June 12.75 UT: m1=11.0, Dia.=6.3’, DC=3/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, opaque centre but weakly condensed. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 June 11.71 UT: m1=10.3, Dia.=7.2’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and very diffuse, no enhancement in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 May  25.74 UT: m1=10.7, Dia.=6.5’, DC=3 ... 25cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse and pale aqua-blue in colour, faint star in coma. Hint of elongation to the West approximately. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 May  22.74 UT: m1=10.2, Dia.=5.8’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter, diffuse with weakly condensed opaque centre. Faint star in coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 May  21.73 UT: m1=10.6, Dia.=4.4’ ... DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Interference by nearby stars. Enhances in Swan Band filter. Diffuse coma, slightly brighter in the centre but weakly condensed. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 May  20.33 UT: m1=11.2, Dia.=3′, DC=2 ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 May  19.75 UT ... m1=10.5, Dia.=6.6’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma large, opaque centre, semi-transparent outer coma appears slightly elongated to the NE. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 May  18.75 UT: m1=10.4, Dia.=5.8’, DC=3/4 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, slight brightening to centre. Enhances slightly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 May  10.63 UT: m1=10.6, Dia.=3.8’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, weakly condensed. Low altitude = 19.4°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 May  09.65 UT: m1=10.5, Dia.=4.1’, DC=2/3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight ... Coma very diffuse, visible just above sky background threshold. Difficult. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 22.29 UT: m1=12.4, Dia.=1′, DC=2 ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Apr. 20.70 UT: m1=11.3, Dia.=5’, DC=2/3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to stars, coma diffuse, slight enhancement in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 16.74 UT: m1=11.0, Dia.=5’, DC=2/3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, close to stars. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 15.73 UT: m1=11.9, Dia.=2.4’, DC=2/3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma appears as a diffuse patch of light, does not enhance in Swan band filter. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 14.68 UT: m1=12.6, Dia.=1.6’, DC=1/2 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter, coma very diffuse. Close to faint stars. Visible at x39 as a patch of diffuse light. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 11.67 UT: m1=12.4, Dia.=1.8’, DC=2/3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Coma very diffuse and visible despite being close to bright star. Minimal interference from moonlight (Moon alt = 0.6°). Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

64P/Swift-Gehrels 
2018 Dec. 31.60 UT: m1=10.2, Dia.=6′, DC=3 ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Ibaraki, Japan)
2018 Dec. 31.04 UT: m1=9.5, Dia.=5′, DC=3 ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 30.88 UT: m1=9.0, Dia.=9′, DC=4 ... 27-cm SCT(58x) ... Valentín Díaz (Cancárix, Albacete, España)
2018 Dec. 29.89 UT: m1=9.5, Dia.=5′, DC=2 ... 15-cm T(44x) ... Carlos Labordena (Castellón, España)
2018 Dec. 28.46 UT: m1=9.2, Dia.=12’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia] [Circular coma, opaque centre, moderately condensed, fading to edges. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 27.46 UT: m1=9.2, Dia.=8.7’, DC=5 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia] [Enhances in Swan Band filter, opaque centre, fading to transparent edges. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 15.00 UT: m1=9.4, Dia.=7′, DC=3 ... 20-cm T(50x) ... Carlos Labordena (Castellón, España)
2018 Dec. 14.06 UT: m1=9.0, Dia.=7′, DC=3 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Trichero – Soto y Amio, Leon, Spain. Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Dec. 13.83 UT: m1=9.1, Dia.=3.5′, DC=3/ ... 13-cm L F:5(25x) ... Danil Sidorko (Korenovsk, Russia)
2018 Dec. 12.04 UT: m1=8.9, Dia.=9′, DC=3/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 11.04 UT: m1=9.2, Dia.=6′, DC=3/ ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [image enhancement with comet filter]
2018 Dec. 11.05 UT: m1=9.0, Dia.=8′, DC=3 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 09.89 UT: m1=9.9, Dia.=3.3′, DC=4 ... 27-cm SCT(93x) ... Valentín Díaz (La Romaneta, Alicante, España)
2018 Dec. 09.80 UT: m1=9.2, Dia.=3′, DC=3/ ... 13-cm L F:5(25x) ... Danil Sidorko (Korenovsk, Russia)
2018 Dec. 08.71 UT: m1=9.3, Dia.=3.3′, DC=3 ... 25-cm L F:5(46x, 150x) ... Danil Sidorko (Korenovsk, Russia)
2018 Dec. 08.48 UT: m1=8.5, Dia.=11’, DC=3/ ... 11×70 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre, weakly condensed. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 07.45 UT: m1=9.0, Dia.=10.4’ ... DC=5 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Star in coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 06.84 UT: m1=8.9, Dia.=8′, DC=3/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars]
2018 Dec. 05.82 UT: m1=9.3, Dia.=8′, DC=3 ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Dec. 03.97 UT: m1=9.5, Dia.=6′, DC=3 ... 10-cm R(26x) ... Valentín Díaz (La Romana, Alicante, España)
2018 Dec. 02.99 UT: m1=9.4, Dia.=5′, DC=3 ... 20×80 B ... Roger Jimenez (Barquisimeto, Venezuela) [light pollution]
2018 Dec. 01.39 UT: m1=9.1, Dia.=6′, DC=3/ ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Dec. 01.45 UT: m1=9.0, Dia.=8.5’, DC=3 ... 11×70 B ... Chris Wyatt (Walcha, NSW, Australia) [Close to stars, Enhances in Swan Band filter, very diffuse. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Nov. 30.75 UT: m1=11.2 CCD, Dia.=1.26′, DC=6 ... 0.25-m f/4.7 Newton + CCD ... Sergey Shurpakov (Observatory C36, Belarus)
2018 Nov. 30.45 UT: m1=9.2, Dia.=6.6’, DC=3 ... 11×70 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, close to mag 8.9 star. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK
2018 Nov. 30.41 UT: m1=9.1, Dia.=8′, DC=4 ... 40.0-cm L f/4.5 (36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 30.04 UT: m1=8.9, Dia.=5′, DC=3/ ... 20×80 B ... Roger Jimenez (Barquisimeto, Venezuela)
2018 Nov. 29.82 UT: m1=9.4, Dia.=4.5′, DC=3/ ... 25.4-cm L (48x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.47]
2018 Nov. 29.47 UT: m1=9.1, Dia.=8.4’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Large transparent outer coma, gradually brightens to opaque centre, small faint stellar pseudo-nucleus visible in good seeing. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 28.83 UT: m1=9.9, Dia.=5’, DC=2 ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 27.82 UT: m1=9.7, Dia.=4′, DC=3 ... 15-cm T(44x) ... Carlos Labordena (Castellón, España)
2018 Nov. 26.43 UT: m1=9.1, Dia.=8.5’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Enhances well in Swan Band filter. Small opaque centre, faintly stellar. Large diffuse and transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 20.94 UT: m1=10.1, Dia.=2.5′, DC=3 ... 20-cm T(50x) ... Carlos Labordena (Castellón, España)
2018 Nov. 17.99 UT: m1=9.1, Dia.=4.5′, DC=3/ ... 25.4-cm L(64x) ... Maik Meyer (Limburg, Germany)
2018 Nov. 17.79 UT: m1=9.3, Dia.=5’, DC=2/ ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 16.99 UT: m1=9.0, Dia.=6.5′, DC=4 ... 25.4-cm L(64x) ... Maik Meyer (Limburg, Germany) [comet involved w/ an 8th mag star. MEY]
2018 Nov. 16.92 UT: m1=9.1, Dia.=5.5’, DC=2/ ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 16.75 UT: m1=9.5, Dia.=3′, DC=4 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [Method S, Lm=6.32]
2018 Nov. 16.12 UT: m1=9.1, Dia.=7′, DC=3/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.9.].
2018 Nov. 14.76 UT: m1=9.3, Dia.=5’, DC=2/ ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 14.01 UT: m1=9.6, Dia.=3.5′, DC=5 ... 60-cm L(81x) ... Sandor Szabo (Sopron, Hungary)
2018 Nov. 13.81 UT: m1=9.2, Dia.=5′, DC=3/ ... 25.4-cm L(64x) ... Maik Meyer (Limburg, Germany)
2018 Nov. 13.14 UT: m1=9.2, Dia.=7′, DC=3/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1280 m, 43º 10′ N, 5º 54′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Nov. 12.76 UT: m1=9.3, Dia.=6′, DC=4 ... 13-cm L(65x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.56]
2018 Nov. 11.44 UT: m1=9.5, Dia.=5’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, star in coma. Moonlight. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 11.04 UT: m1=9.7, Dia.=5′, DC=3 ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 10.96 UT: m1=9.0, Dia.=3.2′, DC=3 ... 25-cm L(73x) ... Valentín Díaz (La Romana, Alicante, España)
2018 Nov. 09.15 UT: m1=9.2, Dia.=7′, DC=3 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [Several stars inside the coma, the brightest being mag. 8.6 (TK). Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Nov. 08.48 UT: m1=9.2, Dia.=8’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Enhances in Swan Band filter. Faint tenuous outer coma, opaque inner coma with small moderately condensed centre. Faint stars in coma. Outer coma appears slightly elongated to the West approximately. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 06.77 UT: m1=9.2, Dia.=6’, DC=3/ ... 20×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 06.04 UT: m1=9.7, Dia.=5′, DC=3 ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 05.94 UT: m1=7.8, Dia.=10′, DC=3 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Nov. 05.84 UT: m1=8.8, Dia.=6′, DC=2 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Nov. 05.83 UT: m1=8.9, Dia.=5′, DC=3 ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Nov. 04.77 UT: m1=9.7, Dia.=3′, DC=5 ... 25.4-cm L (48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.70]
2018 Nov. 03.83 UT: m1=8.7, Dia.=7′, DC=3/ ... 25×100 B ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [In 20 cm SCT (77x) : m1=9.3, Dia.=6′, DC=3. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Nov. 03.78 UT: m1=9.9, Dia.=3.5′, DC=3/ ... 25.4-cm L f/5(64x) ... Maik Meyer (Limburg, Germany)
2018 Nov. 03.64 UT: m1=9.9, Dia.=5′, DC=5 ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 03.43 UT: m1=9.9, Dia.=6.2’, DC=3/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 19.0°. Some interference from bright star in coma. Moderately condensed centre, opaque fading to semi-transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Oct. 30.44 UT: m1=9.9, Dia.=8.0’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Semi-transparent outer coma, opaque inner coma. Low altitude = 19.3°. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Oct. 30.06 UT: m1=10.0, Dia.=4′, DC=2 ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 29.87 UT: m1=10.3, Dia.=3′, DC=3 ... 20-cm SCT(50x) ... Carlos Labordena (Castellón, España)
2018 Oct. 29.45 UT: m1=9.6, Dia.=5′ ... 25×100 B ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Oct. 29.44 UT: m1=10.0, Dia.=6.2’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter. Low altitude= 19.2°. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Oct. 27.42 UT: m1=10.0, Dia.=5’, DC=3/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma centre opaque, moderately condensed, outer coma semi-transparent. Coma centre dims in Swan Band filter. Low altitude = 17.1°. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Oct. 22.09 UT: m1= 10.3, Dia.=3′, DC=2 ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) ...[ moonlight ]
2018 Oct. 21.05 UT: m1=10.3, Dia.=3′, DC=4 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.66]
2018 Oct. 20.15 UT: m1=9.5, Dia.=6′, DC=3 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 Oct. 16.84 UT: m1=10.8, Dia.=2.4′, DC=4/ ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.69]
2018 Oct. 16.11 UT: m1=8.9, Dia.=7′, DC=3 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 Oct. 15.79 UT: m1=11.0, Dia.=2.6′, DC=4/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.23]
2018 Oct. 15.76 UT: m1=10.4, Dia.=2.8′, DC=3 ... 25.4-cm L f/5(64x) ... Maik Mayer (Limburg, Germany)
2018 Oct. 15.74 UT: m1=12.6 CCD, Dia.=0.68′, DC=7/ ... 0.20-m f/4 Schmidt-Newton + CCD ... S. Shurpakov (Observatory A98, Belarus)
2018 Oct. 14.76 UT m1=10.5, Dia.=2.3′, DC=2/ ... 25.4-cm L f/5(64x) ... Maik Mayer (Limburg, Germany)
2018 Oct. 13.76 UT: m1=10.6, Dia.=2.3′, DC=3 ... 25.4-cm L f/5(64x) ... Maik Mayer (Limburg, Germany)
2018 Oct. 13.73 UT: m1=10.4, Dia.=3.2′, DC=3 ... 25-cm L F:5(70.5x, 150x) ... Danil Sidorko (Korenovsk, Russia)
2018 Oct. 11.74 UT: m1=10.8, Dia.=1.8′, DC=4 ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.63]
2018 Oct. 11.73 UT: m1=10.8, Dia.=2.0′, DC=3/ ... 25-cm L F:5(70.5x, 150x) ... Danil Sidorko (Korenovsk, Russia)
2018 Oct. 10.77 UT: m1=10.5, Dia.=2.3′, DC=3 ... 25.4-cm L f/5 (64x) ... Maik Meyer (Limburg, Germany)
2018 Oct. 08.44 UT: m1=11.2, Dia.=4.5’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Slight interference from glare of nearby bright star. Opaque centre, moderately condensed, sometimes appears faintly stellar in periods of good seeing. Low altitude = 16.0°. Poor seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Oct. 07.76 UT: m1=11.6, Dia.=2.5′, DC=3/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.63]
2018 Oct. 07.46 UT: m1=11.6, Dia.=2.3′, DC=4/ ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 06.80 UT: m1=13.4 CCD, Dia.=0.37′, DC=7 ... 0.25-m f/4.7 Newton + CCD ... S. Shurpakov (Observatory C36, Belarus)
2018 Oct. 06.54 UT: m1=11.0, Dia.=2.2′, DC=4 ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 05.78 UT: m1=10.5, Dia.=2.2′, DC=2/ ... 25.4-cm L f/5 (64x) ... Maik Meyer (Limburg, Germany)
2018 Oct. 04.85 UT: m1=11.7, Dia.=1.2′, DC=3/ ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S]
2018 Oct. 04.80 UT: m1=11.3, Dia.=1.3′, DC=2/ ... 25.4-cm L f/5 (104x) ... Maik Meyer (Limburg, Germany)
2018 Oct. 03.85 UT: m1=10.2, Dia.=6′, DC=3 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W)[Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Sep. 30.93 UT: m1=12.3, Dia.=1′, DC=3, no tail ... 23.5-cm SCT(138x) ... Carlos Labordena (Castellón, España)
2018 Sep. 30.79 UT: m1=11.6, Dia.=1.3′, DC=2/ ... 25.4-cm L f/5(104x) ... Maik Meyer (Limburg, Germany)
2018 Sep. 29.81 UT: m1=11.9:, Dia.=1.0′, DC=2/ ... 25.4-cm L 5 104x) ... Maik Meyer (Limburg, Germany)
2018 Sep. 29.76 UT: m1=11.8, Dia.=2′, DC=4 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.47]
2018 Sep. 29.74 UT: m1=14.1 CCD, Dia.=0.26′, DC=7 ... 0.25-m f/4.7 Newton + CCD ... S. Shurpakov (Observatory C36, Belarus)
2018 Sep. 22.01 UT: m1=12.2, Dia.=1.5′, DC=3/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.11]
2018 Sep. 19.16 UT: m1=12.2, Dia.=1.5′, DC=4 ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Brighter inner coma diameter: 1.5′, providing m=12.2 (AQ). Very faint and diffuse outer coma diameter: 5′, providing m=10.8:(TK). Sidgwick method. APASS comparison stars. SQM: 21.5]
2018 Sep. 18.71 UT: m1=13.1, Dia.=1.3’, DC=4 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 19.6°. Diffuse coma with moderately condensed centre. Sky slightly hazy due to dust. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 17.67 UT: m1=12.2, Dia.=1.6′, DC=5 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 16.68 UT: m1=13.2, Dia.=0.8′, DC=6 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 15.04 UT: m1=14.9 CCD, Dia.=0.50′, DC=7/ ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory C36, Belarus)
2018 Sep. 10.00 UT: m1=12.5, Dia.=1.1′, DC=4 ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Brighter inner coma diameter : 1.1′, providing m=12.5 (AQ). Very faint and diffuse outer coma diameter: 3′, providing m=11.2:(AQ). Sidgwick method. APASS comparison stars. SQM: 21.5]
2018 Sep. 09.73 UT: m1=13.6, Dia.=1’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult ... Very diffuse. Transparent coma, slightly brighter centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Sep. 01.89 UT: m1=11.0:, Dia.=6′, DC=1 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In evolution after the recent outburst. Inner coma magnitude was difficult to estimate due to close mag. 13.9 (APASS) star. Faint and diffuse outer coma diameter: 6′, providing m=11.0: (TK). Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 Sep. 01.83 UT: m1=15.7 CCD, Dia.=0.22′, DC=8 ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory C36, Belarus)
2018 Aug. 31.84 UT: m1=15.7 CCD, Dia.=0.28′, DC=7 ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)
2018 Aug. 20.06 UT: m1=13.1, Dia.=1.1′, DC=4 ... 20-cm SCT(133x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In evolution after the recent outburst. Brighter inner coma diameter: 1.1′, providing m=13.1 (APASS). Very faint and diffuse outer coma diameter: 7′, providing m=10.7: (Tycho). Sidgwick method. SQM: 21.5]
2018 Aug. 18.25 UT: m1=13.1:, Dia.=1.25′, DC=3 ... 22-cm L(160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [averted vision]
2018 Aug. 17.91 UT: m1=16.8 CCD, Dia.=0.33′, DC=7/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Baran’, Belarus)
2018 Aug. 16.96 UT: m1=16.4 CCD, Dia.=0.17′, DC=7/ ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory С36, Baran’, Belarus)
2018 Aug. 15.93 UT: m1=14.3, Dia.=0.7′, DC=2 ... 60-cm L(305x) ... Sandor Szabo (Sopron, Hungary)
2018 Aug. 15.73 UT: m1=13.0, Dia.=1’, DC=2/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, opaque across coma, slightly brighter at centre. Post-outburst. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 15.23 UT: m1=14.0, Dia.=0.7’, DC=3 ... 41-cm L(229x) ... Alan Hale (Cloudcroft, New Mexic, USA)
2018 Aug. 14.95 UT: m1=13.2, Dia.=0.6′, DC=7 ... 20-cm SCT(200x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In outburst. Inner coma diameter: 0.6′, surrounded by very faint outer coma. Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 Aug. 06.01 UT: m1=17.1 CCD, Dia.=0.26′, DC=8 ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory С36, Baran’, Belarus)

62P/Tsuchinshan 1 
2018 Apr. 06.95 UT: m1=[16.0, negative ... 60-cm reflector (407x) ... Sandor Szabo (Sopron, Hungary)
2018 Feb. 10.64 UT: m1=12.4, Dia.=2’, DC=2 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight moonlight interference. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 20.69 UT: m1=12.5, Dia.=3.1’, DC=3 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Enhances slightly in Swan Band filter. circular coma with an opaque but weak centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 18.18 UT: m1=10.7, Dia.=5′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 Jan. 17.68 UT: m1=12.5, Dia.=3.3’, DC=2 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, enhances slightly in Swan Band filter at x39. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 13.67 UT: m1=11.8, Dia.=2’, DC=2 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia]) [Coma very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

60P/Tsuchinshan 2 
2018 Dec. 30.71 UT: m1=13.2, Dia.=2.5’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight. Difficult, diffuse coma, visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Dec. 14.25 UT: m1=12.8, Dia.=0.7′, DC=6 ... 20-cm SCT(133x) ... Juan Jose Gonzalez (Alto del Trichero – Soto y Amio, Leon, Spain. Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Sidgwick method. APASS comparison stars. SQM: 21.2]
2018 Nov. 14.11 UT: m1=15.5, Dia.=0.2′, DC=4 ... 60-cm L(406x) ... Sandor Szabo (Sopron, Hungary)
2018 Nov. 03.76 UT: m1=[13.7, negative ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 22.10 UT: m1=17.7 CCD, Dia.=0.18′, DC=8/ ... 0.25-m f/4.7 Newton + CCD ... S. Shurpakov (Observatory C36, Belarus)

48P/Johnson 
2018 Dec. 07.45 UT: m1=13.7, Dia.=1’ ... DC=2 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, difficult due to scintillation due to poor seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 29.49 UT: m1=13.9, Dia.=0.8’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult. Very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 08.47 UT: m1=13.9, Dia.=1’, DC=2 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Getting difficult to see. Coma shows a slight brightening in centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 03.86 UT: m1=10.4, Dia.=6′, DC=1/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Faint outer coma. Observation made under better conditions, providing a wider coma diameter and brighter m1 estimate in comparison with my previous Oct. 16 observation. Altitude: 22 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Oct. 30.41 UT: m1=13.6, Dia.=1.1’, DC=2/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, diffuse with slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Oct. 29.41 UT: m1=13.5, Dia.=1.2’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Oct. 27.41 UT: m1=13.5, Dia.=1’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very small and diffuse, difficult. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Oct. 16.00 UT: m1=11.1, Dia.=3′, DC=2 ... 20-cm SCT(133x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 12 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Oct. 08.42 UT: m1=12.9, Dia.=1.9’, DC=4/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, brighter inner coma but moderately condensed and opaque. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Oct. 07.45 UT: m1=13.5, Dia.=0.7′, DC=4 ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 03.93 UT: m1=10.6, Dia.=6′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Altitude: 20 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 Oct. 01.41 UT: m1=12.6, Dia.=1.1’, DC=5/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Small opaque centre with faint stellar central condensation visible in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 30.98 UT: m1=12.2, Dia.=1′, DC=2, no tail ... 23.5-cm SCT(138x) ... Carlos Labordena (Castellón, España)
2018 Sep. 19.02 UT: m1=10.3, Dia.=7′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Altitude: 16 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Sep. 18.70 UT: m1=12.8, Dia.=1.4’, DC=6 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre faintly stellar. Sky slightly hazy due to dust. Faintly visible at x39. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 17.65 UT: m1=13.3, Dia.=1.0′, DC=4 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 10.39 UT: m1=12.8, Dia.=1.6’, DC=6 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, small opaque inner coma surrounding a faint stellar central condensation. Sky hazy due to dust/smoke in upper atmosphere. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 09.98 UT: m1=10.1, Dia.=7′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Altitude: 19 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Sep. 09.72 UT: m1=13.0, Dia.=1.2’, DC=5/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma shows slight elongation to the NW approximately. Opaque centre, faintly stellar in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 08.40 UT: m1=12.8, Dia.=1.6’, DC=6 ... 25cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma edge diffuse and transparent, opaque inner coma, faint stellar central condensation. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 07.71 UT: m1=12.9, Dia.=1.2’, DC=6 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, gradually brightening to centre, small stellar central condensation. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Aug. 29.38 UT: m1=12.7, Dia.=1.8’, DC=6 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Faint diffuse outer coma, gradually brightening to a stellar centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Aug. 20.12 UT: m1=9.6, Dia.=7′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Mag. 11.5 (TK) star in coma. Altitude: 19 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Aug. 18.71 UT: m1=12.6, Dia.=1.5’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque inner coma, stellar central condensation. Hint of tail to the NW approximately. Very windy conditions, observing at 1250m altitude. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Aug. 15.71 UT: m1=12.5, Dia.=1.4’, DC=6 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter, opaque inner coma, stellar centre, diffuse and transparent outer coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Aug. 15.02 UT: m1=9.7, Dia.=7′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 22 deg.Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Aug. 14.48 UT: m1=12.4, Dia.=1.5’, DC=6 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, and transparent. Faint stellar central condensation. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Aug. 11.97 UT: m1=12.6, m2=15:, Dia.=0.7′, DC=S5, Tail=2′ to PA:250 deg. ... 0.60-m f/4 L(244x) ... Gabor Santa (Tarján, Hungary) [condensed coma with faint nucleus and broad, short tail, h=18 deg.]
2018 Aug. 10.05 UT: m1=9.8, Dia.=6′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2, 21.6 at zenith]
2018 Aug. 08.72 UT: m1=12.7, Dia.=1.6’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Stellar central condensation, diffuse outer coma. Hint of tail to the NW approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Aug. 08.19 UT: m1=12.2, Dia.=2′, DC=3 ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Aug. 08.06 UT: m1=9.7, Dia.=6′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1, 21.5 at zenith]
2018 Aug. 06.60 UT: m1=12.6, Dia.=1.3’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with faint stellar central condensation. Star on SW edge of coma. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 July 23.75 UT: m1=13.0, Dia.=1.3’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint short tail extension to the West approximately. Inner coma opaque with aqua-blue coloured stellar centre, diffuse outer coma. No enhancement in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0. Method= M. Cat= AQ]
2018 July 22.14 UT: m1=9.8, Dia.=6′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Quintanilla de los Oteros, Leon, Spain. Alt. 860 m, 42º 19′ N, 5º 24′ W) [Observation made under better atmospheric conditions, providing a wider outer coma diameter and brighter m1 in comparison with my previous July 18.13 estimate. Altitude: 20 deg. Astronomical twilight. Sidgwick method. Tycho-2 comparison stars. SQM: 20.8]
2018 July 20.73 UT: m1=13.0, Dia.=1.6’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to star. Pale blue stellar centre. Diffuse outer coma. Comparison stars checked using APASS data in Guide 9.0. Method= M. Cat= AQ]
2018 July 18.73 UT: m1=13.2, Dia.=1.8’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Stellar central condensation visible in periods of good seeing. No enhancement in Swan Band filter. Faintly visible at x39. Comparison stars checked using APASS data in Guide 9.0. Method= M. Cat= AQ]
2018 July 18.13 UT: m1=10.5, Dia.=5′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Faint outer coma. Sidgwick method. Tycho-2 comparison stars. SQM: 20.8]
2018 July 16.72 UT: m1=13.3, Dia.=1.3’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Faint stellar central condensation, diffuse outer coma. Faint short coma extension to the West approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 July 14.00 UT: m1=13.7, Dia.=0.6′, DC=4 ... 60-cm L (244x) ... Sandor Szabo (Sopron, Hungary)
2018 July 13.69 UT: m1=13.3, Dia.=0.5′, DC=7 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 13.72 UT: m1=13.0 ... Dia.=1’, DC=5/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, bright opaque centre, appears faintly stellar in periods of good seeing. Close to mag 13.9 star. Faint tail noticeable extending to WSW approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 July 12.49 UT: m1=12.7, Dia.=1.2’, DC=3/ ... 25cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, moderately condensed. Observed from backyard location in town, slight smoke haze. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 11.74 UT: m1=13.5, Dia.=1.2’, DC=4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed centre. Slight interference from proximity of mag 11.6 star. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 23.75 UT: m1=14.1, Dia.=0.7’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very faint stellar central condensation visible in good seeing. Diffuse outer coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 22.76 UT: m1=14.0, Dia.=1’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, centre opaque, faintly stellar in good seeing. NGC 7251 in same field and a little to the SW approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 19.09 UT: m1=11.5, Dia.=4′, DC=2 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASScomparison stars. SQM 21.0. Altitude: 22 deg. From dark mountain skies the comet shows a large and very diffuse outer coma. Field stars checked in DSS]
2018 June 13.75 UT: m1=14.4, Dia.=1.1’, DC=4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 12.73 UT: m1=14.6, Dia.=0.7’, DC=4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, visible in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 11.73 UT: m1=14.6, Dia.=0.8’, DC=3/4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, coma diffuse with slight brightening to centre, visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

46P/Wirtanen 
2018 Dec. 31.72 UT: m1=5.4, Dia.=35’, DC=3 ... Naked Eye ... Martin Lehky (Czech Republic)
2018 Dec. 31.71 UT: m1=5.7, Dia.=25’, DC=3 ... 10×50 B ... Martin Lehky (Czech Republic)
2018 Dec. 31.61 UT: m1=5.0, Dia.=40′, DC=2 ... Naked Eye ... Seiichi Yoshida (Ibaraki, Japan)
2018 Dec. 31.61 UT: m1=5.6, Dia.=40′, DC=3/ ... 10x70R ... Seiichi Yoshida (Ibaraki, Japan)
2018 Dec. 30.90 UT: m1=5.6, Dia.=37′, DC=4 ... 5×25 B ... Valentín Díaz (Cancárix, Albacete, España)
2018 Dec. 30.71 UT: m1=5.4, Dia.=30’, DC=2/ ... Naked Eye ... Martin Lehky (Czech Republic)
2018 Dec. 30.70 UT: m1=5.8, Dia.=20’, DC=2/ ... 10×50 B ... Martin Lehky (Czech Republic)
2018 Dec. 29.87 UT: m1=5.4, Dia.=40′, DC=4 ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Dec. 29.86 UT: m1=5.2, Dia.=40′, DC=3 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Dec. 29.82 UT: m1=5.1, Dia.=45′, DC=3/ ... 12×45 monocular ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In 12×45 monocular: several stars inside the coma, the brightest being mag. 7.4 (TK). Comet visible to naked eye, magnitude difficult to estimate due to nearby field stars. Sidgwick method. Tycho-2 comparison stars]
2018 Dec. 27.094 UT: m1=4.6, Dia.=22′, DC=3 ... 20×80 B ... Roger Jimenez (Barquisimeto, Lara, Venezuela, 10°4′ N, 69° 21′ W, Alt. 606m) [MALE: 4.0. Sidgwick method. Tycho-2 comparison stars. Altura: 37°. Pollution. Urban Sky]
2018 Dec. 26.063 UT: m1=4.4, Dia.=20′, DC=3 ... 20×80 B ... Roger Jimenez (Barquisimeto, Lara, Venezuela, 10°4′ N, 69° 21′ W, Alt. 606m) [MALE: 3.8. Sidgwick method. Tycho-2 comparison stars. Altura: 32°. Pollution. Urban Sky]
2018 Dec. 23.99 UT: m1=4.2, Dia.=23′, DC=3 ... 20×80 B ... Roger Jimenez (Barquisimeto, Lara, Venezuela. 10°4′ N, 69° 21′ W, Alt. 606m) [MALE: 4.0. Sidgwick method. Tycho-2 comparison stars. Altura: 28°. Pollution. Urban Sky]
2018 Dec. 21.08 UT: m1=4.4:, Dia.=40′, DC=3 ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2018 Dec. 20.08 UT: m1=4.2, Dia.= 45′, DC=3/ ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2018 Dec. 19.12 UT: m1= 4.1:, Dia.=50′, DC=3/ ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2018 Dec. 18.12 UT: m1=3.8:, Dia.=70′, DC=3/ ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [moonlight, averted vision]
2018 Dec. 18.08 UT: m1=3.9:, Dia.=60′, DC=4/ ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2018 Dec. 17.41 UT: m1=5.0, Dia.=40′, DC=3 ... 10x66R (10x) ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 17.271 UT: m1=3.7, Dia.=80′, DC=3 ... 20×80 B ... Roger Jimenez (Barquisimeto, Lara, Venezuela, 10°4′ N, 69° 21′ W, Alt. 606m) [MALE: 3.95. Sidgwick method. Tycho-2 comparison stars. Altura: 39°. Pollution. Urban Sky]
2018 Dec. 16.29 UT: m1=3.8, Dia.=80′, DC=3 ... Naked Eye ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 16.29 UT: m1=4.7, Dia.=50′, DC=4 ... 10x66R (10x) ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 16.19 UT: m1=3.6, Dia.=>90′, DC=3/ ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 16.18 UT: m1=3.9, Dia.=70′, DC=5 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 16.09 UT: m1=3.8, Dia.=50′, DC=4 ... 10×70 B ... Jorge Luis Salas (San Diego, Carabobo, Venezuela)
2018 Dec. 16.06 UT: m1=4.1, Dia.=60′, DC=4 ... 10×42 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 15.44 UT: m1=3.6, Dia.=115′, DC=3 ... Naked Eye ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 15.44 UT: m1=4.7, Dia.=55′, DC=5 ... 10x66R (10x) ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 15.13 UT: m1=3.7, Dia.=>90′, DC=3/ ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 15.12 UT: m1=4.0, Dia.=70′, DC=5 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 15.104 UT: m1=3.7, Dia.=33′, DC=2 ... 20×80 B ... Roger Jimenez (Barquisimeto, Lara, Venezuela, 10°4′ N, 69° 21′ W, Alt. 606m) [MALE: 3.9. Sidgwick method. Tycho-2 comparison stars. Altura: 84°. Pollution. Urban Sky. Moonlight 45%]
2018 Dec. 14.99 UT: m1=4.6, Dia.=30′, DC=2 ... 10-cm R f/5(20x) … Willian Souza (Sao Paulo, Brazil)
2018 Dec. 14.98 UT: m1=4.6, Dia.=30′, DC=3 ... 15×70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 14.97 UT: m1=4.0, Dia.=75′, DC=3 ... 3.3-cm R(5x) ... Carlos Labordena (Castellón, España)
2018 Dec. 14.97 UT: m1=4.5, Dia.=30′, DC=3 ... 10×42 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 14.62 UT: m1=4.3, Dia=76.5’, DC=5/ ... 1.6×28 R ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude estimate made using 50mm f/1.8 camera lens as an objective and 32mm Plossl eyepiece, hand-held, giving a magnification of x1.6 (Aperture rounded to 28.0mm). Coma well condensed, appears stellar sometimes. Easily visible naked eye. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 14.42 UT: m1=3.4, Dia.=95′, DC=4 ... Naked Eye ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 14.42 UT: m1=4.7, Dia.=60′, DC=5 ... 10x66R (10x) ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 14.13 UT: m1=3.7, Dia.=>90′, DC=3/ ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 14.12 UT: m1=4.0, Dia.=70′, DC=5 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 14.00 UT: m1=4.1, Dia.=75′, DC=4 ... Naked Eye ... Juan Jose Gonzalez (Alto del Trichero – Soto y Amio, Leon, Spain. Alt. 1190 m, 42º 46′ N, 5º 53′ W) [In 12×45 monocular: m1=4.2, Dia.=65′, DC=4. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Dec. 13.98 UT: m1=4.6, Dia.=30′, DC=3 ... 15×70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 13.83 UT: m1=4.5, Dia.=45′, DC=5 ...15×70 B ... Danil Sidorko (Korenovsk, Russia) [very good visible with the naked eye]
2018 Dec. 13.21 UT: m1=3.9, Dia.=70′, DC=3 ... Naked Eye ... Seiichi Yoshida (Mauna Kea, Hawaii)
2018 Dec. 13.21 UT: m1=4.8, Dia.=50′, DC=4 ... 10x66R (10x) ... Seiichi Yoshida (Mauna Kea, Hawaii)
2018 Dec. 13.10 UT: m1=3.7:, Dia.=>90′, DC=3/ ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 13.09 UT: m1=4.0:, Dia.=70′, DC=5 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 13.09 UT: m1=4.2, Dia.=15’, DC=3 ... 15×70 B ... Mariano Ribas (Buenos Aires, Argentina) [El cometa es imposible de ver a simple vista en cielo urbano, aunque es más fácil de detectar ¨que hace una semana con los mismos binoculares 15×70)
2018 Dec. 13.041 UT: m1=3.7, Dia.=55′, DC=3 ... Naked eye ... Roger Jimenez (COAT, Lara, Venezuela) [MALE: 5.3. Altura: 64°. Luna a 21° altura sobre el horizonte Oeste-Sur-Oeste, 26% iluminada]
2018 Dec. 13.024 UT: m1=3.8, Dia.=39′, DC=3 ... 20×80 B ... Roger Jimenez (COAT, Lara, Venezuela) [MALE: 5.3. Método: Sidgwick. Comparación de estrellas usando datos del catálogo Tycho-2. Altura: 58°. Luna a 30° altura sobre el horizonte Oeste-Sur-Oeste, 26% iluminada]
2018 Dec. 13.023 UT: m1=3.8, Dia.=39′, DC=3 ... 20×80 B ... Oscar Alvarado (COAT, Lara, Venezuela) [MALE: 5.3. Método: Sidgwick. Comparación de estrellas usando datos del catálogo Tycho-2. Altura: 58°. Luna a 30° altura sobre el horizonte Oeste-Sur-Oeste, 26% iluminada]
2018 Dec. 13.022 UT: m1=3.8, Dia.=39′, DC=3 ... 20×80 B ... Jesús Guerrero (COAT, Lara, Venezuela) [MALE: 5.3. Método: Sidgwick. Comparación de estrellas usando datos del catálogo Tycho-2. Altura: 58°. Luna a 30° altura sobre el horizonte Oeste-Sur-Oeste, 26% iluminada]
2018 Dec. 13.021 UT: m1=3.8, Dia.=39′, DC=3 ... 20×80 B ... Ángel Reyes (COAT, Lara, Venezuela) [MALE: 5.3. Método: Sidgwick. Comparación de estrellas usando datos del catálogo Tycho-2. Altura: 58°. Luna a 30° altura sobre el horizonte Oeste-Sur-Oeste, 26% iluminada]
2018 Dec. 12.34 UT: m1=4.1, Dia.=50′, DC=1 ... Naked Eye, Seiichi Yoshida (Kailua Kona, Hawaii)
2018 Dec. 12.33 UT: m1=4.9, Dia.=40′, DC=4 ... 10x66R (10x) ... Seiichi Yoshida (Kailua Kona, Hawaii)
2018 Dec. 12.18 UT: m1=4.8, Dia.=>30′, DC=3 ... 10×50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 12.07 UT: m1=3.8, Dia.=>90′, DC=3/ ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 12.06 UT: m1=4.1, Dia.=70′, DC=5 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 12.06 UT: m1=4.5:, Dia.=30′, DC=2 ... Naked Eye ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 12.05 UT: m1=4.8, Dia.=60′, DC=4 ... 10×50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 12.04 UT: m1=4.5, Dia.=50’, DC=4 ... 10×50 B ... Alberto Anunziato (Paraná, Argentina) [No tail, Mét. Sidgwick, Cat. Tycho II]
2018 Dec. 11.86 UT: m1=4.1, Dia.=70′, DC=4/ ... Naked Eye ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [In 12×45 monocular: m1=4.3, Dia.=65′, DC=4. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2. Mountain location, very clear sky]
2018 Dec. 11.20 UT: m1=4.9:, Dia.=45′, DC=3 ... 10×50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 11.07 UT: m1=3.9, Dia.=90′, DC=3/ ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 11.06 UT: m1=4.2, Dia.=60′, DC=4/ ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [By using 20×100 B and refletor 22-cm L(32x): Tail= 30′ in PA: 55 deg. (in the reflector I could see 3 tails, in PA: 15, 55 and 80 respectively]
2018 Dec. 11.03 UT: m1=4.8, Dia.=60′, DC=4 ... 10×70 B ... Jorge Luis Salas (San Diego, Carabobo, Venezuela)
2018 Dec. 11.01 UT: m1=4.5:, Dia.=60′, DC=2 ... Naked Eye ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 10.99 UT: m1=4.8, Dia.=60′, DC=4 ... 10×50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 10.80 UT: m1=4.7, Dia.=35′, DC=5 ... 15×70 B ... Danil Sidorko (Korenovsk, Russia)
2018 Dec. 10.47 UT: m1=4.4, Dia.=84’, DC=5 ... 1.6×28 R ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude estimate made using 50mm f/1.8 camera lens as an objective and 32mm Plossl eyepiece, hand-held, giving a magnification of x1.6 (Aperture rounded to 28.0mm). Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 10.46 UT: m1=4.4, Dia.=84’, DC=4 ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye. Coma very large and diffuse. Enhances strongly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 10.46 UT: m1=4.5, Dia.=63’, DC=5 ... 3.3×28 R ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude estimate made using 50mm f/1.8 camera lens as an objective and 15mm Plossl eyepiece, hand-held, giving a magnification of x3.3 (Aperture rounded to 28.0mm). Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 10.45 UT: m1=4.8, Dia.=56’, DC=4/ ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight. Coma transparent, inner coma opaque, moderately condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 10.44 UT: m1=5.3, Dia.=25′, DC=1 ... 10x66R (10x) ... Seiichi Yoshida (Honolulu, Hawaii)
2018 Dec. 10.01 UT: m1=4.0:, Dia.=70′, DC=3 ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Clouds]
2018 Dec. 10.01 UT: m1=5.0:, Dia.=20′, DC=3 ... 10×42 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 10.00 UT: m1=4.2:, Dia.=45′, DC=4 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Clouds]
2018 Dec. 09.99 UT: m1=5.0, Dia.=20′, DC=3 ... 15×70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 09.91 UT: m1=4.8, Dia.=40’, DC=3 ... 10×50 B ... Alberto Anunziato (Paraná, Argentina) [Cola:NO. Mét. Sidgwick, Cat. Tycho II]
2018 Dec. 09.87 UT: m1=5.1, Dia.=42′, DC=3 ... 5×25 B ... Valentín Díaz (La Romaneta, Alicante, España)
2018 Dec. 09.86 UT: m1=5.2, Dia.=42′, DC=3 ... 10×50 B ... Valentín Díaz (La Romaneta, Alicante, España)
2018 Dec. 09.80 UT: m1=4.5, Dia.=36′, DC=5, 15×70 B + Naked Eye ... Danil Sidorko (Korenovsk, Russia)
2018 Dec. 09.33 UT: m1=5.0, Dia.=40’, DC=3 ... 10×50 B ... Alberto Anunziato (Paraná, Argentina) [Cola:NO. Mét. Sidgwick, Cat. Tycho II]
2018 Dec. 09.21 UT: m1=4.3, Dia.=60′, DC=4 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 09.088 UT: m1=4.2 Dia.=27′, DC=4 ... 20-cm SCT f/10(50x) ... Roger Jimenez (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación Tycho-2. Altura: 89°]
2018 Dec. 09.087 UT: m1=4.2 Dia.=27′, DC=4 ... 20-cm SCT f/10(50x) ... Oscar Alvarado (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación Tycho-2. Altura: 89°]
2018 Dec. 09.086 UT: m1=4.2 Dia.=27′, DC=4 ... 20-cm SCT f/10(50x) ... Jesús Guerrero (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación Tycho-2. Altura: 89°]
2018 Dec. 09.085 UT: m1=4.2 Dia.=27′, DC=4 ... 20-cm SCT f/10(50x) ... Ángel Reyes (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación Tycho-2. Altura: 89°]
2018 Dec. 09.066 UT: m1=3.9, Dia.=74′, DC=3 ... 20×80 B ... Roger Jimenez (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación: Tycho-2. Altura: 76°]
2018 Dec. 09.065 UT: m1=3.9, Dia.=74′, DC=3 ... 20×80 B ... Oscar Alvarado (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación: Tycho-2. Altura: 76°]
2018 Dec. 09.064 UT: m1=3.9, Dia.=74′, DC=3 ... 20×80 B ... Jesús Guerrero (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación: Tycho-2. Altura: 76°]
2018 Dec. 09.063 UT: m1=3.9, Dia.=74′, DC=3 ... 20×80 B ... Ángel Reyes (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación: Tycho-2. Altura: 76°]
2018 Dec. 09.06 UT: m1=4.5, Dia.=35’, DC=3 ... 15×70 B ... Mariano Ribas (Pardo, Pcia. de Buenos Aires, Argentina) [La coma del cometa presenta una baja concentración y, visualmente, un débil tono gris verdoso que se hace más patente cerca del núcleo. A simple vista es un objeto poco llamativo, aunque mucho más patente con visión avertida)
2018 Dec. 09.05 UT: m1=5.0, Dia.=85′, DC=4 ... 10×70 B ... Jorge Luis Salas (San Diego, Carabobo, Venezuela)
2018 Dec. 08.99 UT: m1=5.0, Dia.=88′, DC=4 ... 11.4-cm L(60x) ... Jorge Luis Salas (San Diego, Carabobo, Venezuela)
2018 Dec. 08.93 UT: m1=4.6, Dia.=60′, DC=3 ... 3.3-cm R(5x) ... Carlos Labordena (Castellón, España)
2018 Dec. 08.80 UT: m1=4.5, Dia.=45′, DC=3 ... 15×70 B + Naked Eye ... Danil Sidorko (Korenovsk, Russia) [in culmination, alt= 40 degrees above the horizon]
2018 Dec. 08.70 UT: m1=4.7, Dia.=25′, DC=2/ ... 15×70 B ... Danil Sidorko (Korenovsk, Russia) [alt= 30 degrees above the horizon]
2018 Dec. 08.50 UT: m1=4.4, Dia.=60′ ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Dec. 08.48 UT: m1=4.9, Dia.=63.5’, DC=3 ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye. Coma large and diffuse, opaque centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 08.47 UT: m1=4.9, Dia.=53’, DC=5 ... 3.3×28 R ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude estimate made using 50mm f/1.8 camera lens as an objective and 15mm Plossl eyepiece, hand-held, giving a magnification of x3.3 (Aperture rounded to 28.0mm) Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 08.47 UT: m1=4.8, Dia.=44’, DC=5 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Transparent outer coma gradually brightening to an opaque inner coma and well condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 08.04 UT: m1=5.2, Dia.=80′, DC=3 ... 10×70 B ... Jorge Luis Salas (San Diego, Carabobo, Venezuela)
2018 Dec. 07.95 UT: m1=5.1, Dia.=35′, DC=2 ... 5×25 B ... Valentín Díaz (Elche capital, España)
2018 Dec. 07.49 UT: m1=4.4: ... Naked eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Dec. 07.47 UT: m1=5.0, Dia.=49’, DC=5 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Visible naked eye but close to stars. Star on NE edge of coma. Coma very opaque, well condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 07.20 UT: m1=5.0, Dia.=30′, DC=3 ... 10×50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 07.04 UT: m1=4.4, Dia.=60′, DC=4 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 07.05 UT: m1=4.1:, Dia.=80′, DC=3 ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 06.99 UT: m1=5.1, Dia.=>30′, DC=3 ... 10×50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 06.83 UT: m1=5.0, Dia.=65′, DC=3/ ... 12×45 monocular ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Several stars inside the coma, the brightest being mag. 3.9 (TK), not allowing a naked eye estimate. Sidgwick method. Tycho-2 comparison stars]
2018 Dec. 06.50 UT: m1=4.7, Dia.=60′ ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Dec. 06.45 UT: m1=4.8, Dia.=55’, DC=3 ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye. Large coma, opaque centre, diffuse outer. Enhances strongly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Dec. 06.45 UT: m1=5.1, Dia.=48’, DC=5 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, brightening to a well condensed opaque centre. Pale aqua-blue in colour. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 06.22 UT: m1=5.1, Dia.=>30′, DC=3 ... 10×50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 06.05 UT: m1=4.2:, Dia.= 80′, DC=3 ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 06.04 UT: m1=4.5, Dia.= 60′, DC=4 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 06.04 UT: m1=4.8, Dia.=36′, DC=2 ... 20×80 B ... Roger Jimenez (Barquisimeto, Venezuela) [MALE: 4.25. Método: Sidgwick. Comparación: carta X23594PO AVSSO. Altura: 57°]
2018 Dec. 06.04 UT: m1=5.2, Dia.=30′, DC=3 ... 10×50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 05.90 UT: m1=4.7, Dia.=60′, DC=3 ... 3.3-cm R(5x) ... Carlos Labordena (Castellón, España)
2018 Dec. 05.04 UT: m1=4.9, Dia.=27′, DC=2 ... 20×80 B ... Roger Jimenez (Barquisimeto, Venezuela) [MALE: 4.25. Método: Sidgwick. Comparación: carta X23582BE AVSSO. Altura: 56°]
2018 Dec. 04.10 UT: m1=4.3:, Dia.=75′, DC=2/ ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 04.09 UT: m1=4.5, Dia.=50′, DC=3 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 03.91 UT: m1=5.6, Dia.=40′, DC=2 ... 10×50 B ... Valentín Díaz (La Romana, Alicante, España)
2018 Dec. 03.50 UT: m1=4.8, Dia.=75′ ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Dec. 03.02 UT: m1=5.5, Dia.=20′, DC=2 ... 20×80 B ... Roger Jimenez (Barquisimeto, Venezuela) [light pollution]
2018 Dec. 02.05 UT: m1=5.0, Dia.=40′, DC=3 ... 45-cm L f/4.4(50x) ... Roger Jimenez (COAT, Lara, Venezuela)
2018 Dec. 02.04 UT: m1=5.0, Dia.=40′, DC=3 ... 45-cm L f/4.4(50x) ... Jesús Guerrero (COAT, Lara, Venezuela)
2018 Dec. 02.03 UT: m1=5.0, Dia.=40′, DC=3 ... 45-cm L f/4.4(50x) ... Geonell Romero (COAT, Lara, Venezuela)
2018 Dec. 02.02 UT: m1=5.0, Dia.=40′, DC=3 ... 45-cm L f/4.4(50x) ... Rebeca Mendoza (COAT, Lara, Venezuela)
2018 Dec. 01.50 UT: m1=5.6, Dia.=28′, DC=3 ... 10x70R ... Seiichi Yoshida (Gunma, Japan)
2018 Dec. 01.49 UT: m1=5.1: ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Dec. 01.44 UT: m1=5.1, Dia.=56’, DC=3 ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye ... Coma diffuse, sometimes appears faintly stellar in periods of good seeing. Observing altitude at 1250m, approximately 30kms East of Walcha. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Dec. 01.43 UT: m1=5.4, Dia.=48’, DC=4 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, opaque centre, pale-aqua blue in colour, enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 30.93 UT: m1=5.3, Dia.=35′, DC=3 ... 10-cm B(25x) ... Carlos Labordena (Castellón, España)
2018 Nov. 30.81 UT: m1=4.7, Dia.=80′, DC=3 ... Naked Eye ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [In 12×45 monocular: m1=4.8, Dia.=110′, DC=2/. Sidgwick method. Tycho-2 comparison stars. SQM: 20.7]
2018 Nov. 30.51 UT: m1=4.9, Dia.=60 ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Nov. 30.44 UT: m1=5.2, Dia.=58’, DC= 3 ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye. Coma was easier to see when curling thumb and forefinger around my eye to reduce my field of view, gradually became easier to spot directly once fully dark adapted. Sometimes appears stellar in good seeing. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 30.43 UT: m1=5.6, Dia.=28′, DC=2 ... 10x70R ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 30.43 UT: m1=5.6, Dia.=37’, DC=4/ ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Very small white centre surrounded by opaque inner coma, gradually fading to transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 30.08 UT: m1=5.9, Dia.=20′, DC=2/ ... 20×80 B ... Roger Jimenez (Barquisimeto, Venezuela) [Polución]
2018 Nov. 29.79 UT: m1=6.8, Dia.=25′, DC=3 ... 6-cm B(20x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.44]
2018 Nov. 29.48 UT: m1=5.3, Dia.=72.0’, DC=3 ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye. Limiting magnitude= 6.5, With Swan Band filter the coma appears slightly larger. Very diffuse, almost directly overhead. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 29.48 UT: m1=5.7, Dia.=37’, DC=4 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Large transparent outer coma, gradually brightening to an opaque inner coma, aqua-blue in colour, with a moderately condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 29.04 UT: m1=5.0:, Dia.=60′, DC=2 ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 29.03 UT: m1=5.2, Dia.=45′, DC=2/ ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 28.88 UT: m1=6.8, Dia.=11’, DC=2 ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 28.19 UT: m1=5.4, Dia.=55′, DC=2/ ... 20×80 B ... Roger Jimenez (COAT, Saroche, Venezuela)
2018 Nov. 28.18 UT: m1=5.4, Dia.=55′, DC=2/ ... 20×80 B ... Oscar Alvarado (COAT, Saroche, Venezuela)
2018 Nov. 28.17 UT: m1=5.4, Dia.=55′, DC=2/ ... 20×80 B ... Angel Reyes (COAT, Saroche, Venezuela)
2018 Nov. 28.08 UT: m1=5.3, Dia.=45′, DC=2/ ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 27.84 UT: m1=5.6, Dia.=20′, DC=2 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Nov. 27.04 UT: m1=5.2:, Dia.=60′, DC=2 ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 27.03 UT: m1=5.4, Dia.=45′, DC=2/ ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 26.96 UT: m1=6.4, Dia.=15′, DC=3 ... 15×70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Nov. 26.47 UT: m1=5.0, Dia.=45′ ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia) [Enhanced through Swan Band filter]
2018 Nov. 26.42 UT: m1=5.7, Dia.=36’, DC=4 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Enhances in Swan Band filter. Mag 8.3 star in coma. Comet was faintly visible naked eye but difficult to obtain a naked eye magnitude estimate, however, the naked eye coma diameter was made out to about 1 degree. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 26.00 UT: m1=5.4, Dia.= 40′, DC=2 ... 4×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 25.42 UT: m1=6.1, Dia.=28’, DC=4 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Close to mag 6.4 star, at the Western edge of coma. Moderately condensed, semi-transparent outer coma, opaque inner coma. Possible naked eye but too close to star to be certain. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Nov. 24.41 UT: m1=6.0, Dia.=30’, DC=3/ ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Sky slightly hazy with thin cloud, moon rising. Windy conditions. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Nov. 22.08 UT: m1=5.5:, Dia.=30′, DC=2 ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [strong moonlight]
2018 Nov. 20.91 UT: m1=7.1, Dia.=7′, DC=2 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Nov. 17.96 UT: m1=6.4, Dia.=10′, DC=3 ... 15×70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Nov. 17.69 UT: m1=5.9 ... Naked eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Nov. 17.69 UT: —, Dia.=24′ ... 10×50 B ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Nov. 16.00 UT: m1=5.7, Dia.=32′, DC=2/ ... 12×45 monocular ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [Altitude: 15 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Nov. 14.08 UT: m1=6.7, Dia.=28′, DC=3 ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 13.98 UT: m1=6.8, Dia.=10′, DC=3 ... 10-cm R f/5(34x) ... Willian Souza (Sao Paulo, Brazil) ...
2018 Nov. 13.08 UT: m1=6.8, Dia.=25′, DC=3 ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 13.00 UT: m1=6.2, Dia.=27′, DC=2/ ... 12×45 monocular ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1280 m, 43º 10′ N, 5º 54′ W) [Altitude: 14 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 Nov. 12.04 UT: m1=6.8, Dia.=25′, DC=3 ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 11.67 UT: m1=6.6, Dia.=28’, DC=3 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Bright stars in coma, opaque centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Nov. 11.17 UT: m1=6.9, Dia.=25′, DC=3 ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 10.98 UT: m1=8.2, Dia.=11′, DC=2 ... 20×80 B ... Valentín Díaz (La Romana, Alicante, España)
2018 Nov. 10.64 UT: m1=7.3, Dia.=29’, DC=3/ ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma large, diffuse, moderately condensed. Enhances in Swan Band filter. Faint stars in coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 08.49 UT: m1=7.3, Dia.=28’, DC=3 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma large, circular, diffuse opaque centre. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Nov. 06.89 UT: m1=8.4, Dia.=10’, DC=2 ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 06.06 UT: m1=7.8, Dia.=20′, DC=2/ ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 06.05 UT: m1=7.9, Dia.=18′, DC=3 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 05.93 UT: m1=7.6, Dia.=12′, DC=3 ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Nov. 05.15 UT: m1=7.9, Dia.=18′, DC=2 ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 05.14 UT: m1=8.1, Dia.=15′, DC=2/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 04.01 UT: m1=7.4, Dia.=15′, DC=3 ... 10×50 B ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Altitude: 14 deg. In 25x100B: m1=7.7, Dia.=12′, DC=3. In 20 cm SCT (77x): m1=8.1, Dia.=9′, DC=3/. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Nov. 03.63 UT: m1=8.5, Dia.=7′, DC=2 ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 03.41 UT: m1=7.7, Dia.=20’, DC=3 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma close to faint stars, slight interference. Very tenuous outer coma. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 02.99 UT: m1=8.0, Dia.=18′, DC=2 ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 02.98 UT: m1=8.2, Dia.=15′, DC=2/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 31.08 UT: m1=8.3, Dia.=12′, DC=2/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 31.09 UT: m1=8.1, Dia.=14′, DC=2 ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 30.51 UT: m1=8.0, Dia.=12′ ... 10×50 B ... David A. J. Seargent (Cowra, NSW, Australia) [Also visible in 6×35 binoculars]
2018 Oct. 30.43 UT: m1=8.4, Dia.=22’, DC=3/ ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, faint stars in coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Oct. 30.08 UT: m1=8.4, Dia.=10′, DC=2/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 30.09 UT: m1=8.2, Dia.=12′, DC=2 ... 7×50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 29.89 UT: m1=8.8, Dia.=5′, DC=2 ... 20-cm SCT(50x) ... Carlos Labordena (Castellón, España)
2018 Oct. 29.46 UT: m1=7.9, Dia.=15′ ... 25×100 B ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Oct. 29.42 UT: m1=8.6, Dia.=20’, DC=3/ ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slightly brighter and opaque in centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Oct. 29.06 UT: m1=8.7, Dia.=6′, DC=3 ... 25-cm L(45x) ... Gonzalo Vargas (Cochabamba, Bolivia) [Wide coma and very diffuse centre, more clear view using an SkyGlow filter]
2018 Oct. 29.06 UT: m1=8.6, Dia.=8′, DC=2/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [clouds]
2018 Oct. 27.40 UT: m1=8.5, Dia.=20’, DC=3 ... 7×50 B ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse coma, opaque centre. Coma centre enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Oct. 22.06 UT: m1= 9.5, Dia.=5′, DC=2/ ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) ...[ moonlight ... little enhancement with comet filter ]
2018 Oct. 20.11 UT: m1=9.2, Dia.=8′, DC=2/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 11 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Oct. 16.07 UT: m1=9.6, Dia.=7′, DC=2/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Mag. 11.2 (TK) star in coma. Altitude: 16 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Oct. 13.21 UT: m1=10.3, Dia.=4′, DC=3 ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 08.44 UT: m1=9.9, Dia.=10.2’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very large and diffuse, enhances well in Swan band filter. Semi-transparent outer coma, slightly more condensed at centre and opaque. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Oct. 07.71 UT: m1=11.9, Dia.=3.0′, DC=3/ ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 06.61 UT: m1=11.4, Dia.=1.7′, DC=3/ ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 06.21 UT: m1=11.4, Dia.=2′, DC=2 ... 22-cm L(160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 04.00 UT: m1=10.6, Dia.=4′, DC=2/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.8]
2018 Oct. 01.42 UT: m1=10.9, Dia.=4.8’, DC=2 ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse and difficult, weakly condensed. Enhances with Swan Band filter applied and the coma appears to be a little larger. Sky slightly hazy. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Sep. 30.96 UT: m1=11.7, Dia.=1.5′, DC=2, no tail ... 23.5-cm SCT(138x) ... Carlos Labordena (Castellón, España)
2018 Sep. 27.40 UT: m1=11.0, Dia.=5’, DC=2/ ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight interference. Moon -2.1° altitude. Difficult, very diffuse and weakly condensed. Enhances slightly in Swan Band filter. Low altitude= 17.2°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Sep. 19.12 UT: m1=11.6, Dia.=2.0′, DC=2/ ... 20-cm SCT(133x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Altitude: 25 deg. Observation made under better conditions, providing a wider coma diameter and brighter magnitude estimate in comparison with my previous Sep. 10 observation. Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 Sep. 18.73 UT: m1=12.4, Dia.=3.4’, DC=2 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances slightly in Swan Band filter. Very diffuse. Sky slightly hazy due to dust. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Sep. 17.70 UT: m1=[13.4, negative ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 16.70 UT: m1=[13.6, negative ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 10.10 UT: m1=12.4, Dia.=1.5′, DC=3 ... 20-cm SCT(133x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Altitude: 27 deg. Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 Sep. 09.74 UT: m1=13.6, Dia.=1.3’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult. Very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

38P/Stephan-Oterma 
2018 Dec. 31.62 UT: m1=10.1, Dia.=5′, DC=6/ ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Ibaraki, Japan)
2018 Dec. 30.92 UT: m1=10.3, Dia.=4′, DC=4 ... 27-cm SCT(58x) ... Valentín Díaz (Cancárix, Albacete, España)
2018 Dec. 30.66 UT: m1=10.0, Dia.=4.5’, DC=3/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight. Low altitude= 18.8°. Coma diffuse, opaque centre, transparent outer coma, enhances slightly in Swan band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 30.19 UT: m1=10.1, Dia.=3.5′, DC=3 ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 29.84 UT: m1=9.7, Dia.=6′, DC=3/, Tail= 0.15 deg. in PA: 260 deg. ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars]
2018 Dec. 15.03 UT: m1=9.9, Dia.=3′, DC=3 ... 20-cm T(80x) ... Carlos Labordena (Castellón, España)
2018 Dec. 14.23 UT: m1=9.5, Dia.=5′, DC=3/ ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 14.05 UT: m1=10.2, Dia.=4′, DC=3/, Tail= 0.2 deg. in PA: 270 deg. ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Trichero – Soto y Amio, Leon, Spain. Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Dec. 13.83 UT: m1=9.8, Dia.=3′, DC=3 ... 13-cm L F:5(25x) ... Danil Sidorko (Korenovsk, Russia)
2018 Dec. 09.80 UT: m1=9.6, Dia.=3.2′, DC=4 ... 13-cm L F:5(25x) ... Danil Sidorko (Korenovsk, Russia)
2018 Dec. 09.25 UT: m1=9.5, Dia.=5′, DC=3 ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 07.14 UT: m1=9.4, Dia.=5′, DC=3/, Tail= 0.2 deg. in PA: 260 deg. ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars]
2018 Dec. 05.94 UT: m1=10.2, Dia.=3′, DC=4 ... 15-cm T(44x) ... Carlos Labordena (Castellón, España)
2018 Dec. 01.75 UT: m1=10.5, Dia.=3.3′, DC=4 ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 30.86 UT: m1=10.7 CCD, Dia.=1.22′, DC=6 ... 0.25-m f/4.7 Newton + CCD ... Sergey Shurpakov (Observatory C36, Belarus)
2018 Nov. 30.62 UT: m1=9.8, Dia.=3.0′, DC=6 ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 29.83 UT: m1=10.3, Dia.=1.8′, DC=4 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.47]
2018 Nov. 27.87 UT: m1=11.7 CCD, Dia.=1.11′, DC=6/, Tail=2.6′ in PA: 258 deg. ... 0.25-m f/4.7 Newton + CCD ... Sergey Shurpakov (Observatory C36, Belarus)
2018 Nov. 20.98 UT: m1=10.1, Dia.=3′, DC=3 ... 20-cm T(50x) ... Carlos Labordena (Castellón, España)
2018 Nov. 18.00 UT: m1=9.8, Dia.=3′, DC=3/ ... 25.4-cm L(64x) ... Maik Meyer (Limburg, Germany)
2018 Nov. 17.94 UT: m1=9.4, Dia.=4.5’, DC=3 ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 17.68 UT: m1=9.8 ... Dia.=4′ ... 25×100 B ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Nov. 17.01 UT: m1=9.7, Dia.=3′, DC=3/ ... 25.4-cm L(64x) ... Maik Meyer (Limburg, Germany)
2018 Nov. 16.94 UT: m1=9.6, Dia.=4’, DC=3/ ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 16.13 UT: m1=9.5, Dia.=5′, DC=3, Tail= 0.15 deg. in PA: 260 deg. ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [Several stars inside the coma, the brightest being mag. 11.3 (HS). Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Nov. 16.13 UT: m1=10.0, Dia.=2.5′, DC=5 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.30]
2018 Nov. 14.05 UT: m1=11.1, Dia.=1.5′, DC=6 ... 60-cm L(81x) ... Sandor Szabo (Sopron, Hungary)
2018 Nov. 13.15 UT: m1=9.4, Dia.=5′, DC=2/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1280 m, 43º 10′ N, 5º 54′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Nov. 13.10 UT: m1=9.5, Dia.=1.5′, DC=4/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.65]
2018 Nov. 11.70 UT: m1=10.4, Dia.=5.5’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint star in coma, very diffuse outer coma. Moderately condensed opaque centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 11.21 UT: m1=9.3, Dia.=5′, DC=2 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 11.02 UT: m1=10.0, Dia.=7′, DC=4 ... 25-cm L(57x) ... Valentín Díaz (La Romana, Alicante, España)
2018 Nov. 10.67 UT: m1=9.8, Dia.=4’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Opaque centre, sometimes faintly stellar. Semi-transparent outer coma. Enhances in Swan Band filter. Close to star. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat=TK]
2018 Nov. 09.17 UT: m1=9.3, Dia.=5′, DC=2/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Collada del Fresno – Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10′ N, 5º 54′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Nov. 06.98 UT: m1=9.5, Dia.=4’, DC=4 ... 25×100 B ... Martin Lehky (Czech Republic)
2018 Nov. 05.96 UT: m1=9.8, Dia.=4′, DC=3 ... 15cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Nov. 05.19 UT: m1=9.7, Dia.=3′, DC=3 ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 05.06 UT: m1=10.4, Dia.=1.5′, DC=4/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.48]
2018 Nov. 04.00 UT: m1=9.0, Dia.=6′, DC=3 ... 25×100 B ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [In 20 cm SCT (77x) : m1=9.1, Dia.=6′, DC=3. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Nov. 03.65 UT: m1=10.0, Dia.=6′, DC=3/ ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 22.25 UT: m1= 10.0, Dia.=3′, DC=3 ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [moonlight ... clouds]
2018 Oct. 21.08 UT: m1=11.1, Dia.=0.8′, DC=5 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.75]
2018 Oct. 22.16 UT m1=10.2, Dia.=3.4′, DC=2 ... 25.4-cm L f/5(64x) ... Maik Meyer (Limburg, Germany)
2018 Oct. 17.06 UT: m1=11.1, Dia.=1.3′, DC=4 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, green zone]
2018 Oct. 16.16 UT: m1=10.3, Dia.=2.9′, DC=3 ... 25.4-cm L f/5(64x) ... Maik Mayer (Limburg, Germany)
2018 Oct. 16.08 UT: m1=9.1, Dia.=7′, DC=2/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Oct. 15.15 UT: m1=10.3, Dia.=2.8′, DC=3 ... 25.4-cm L f/5(64x) ... Maik Mayer (Limburg, Germany)
2018 Oct. 14.09 UT: m1=10.3 Dia.=3.8′, DC=3 ... 25.4-cm L f/5(64x) ... Maik Mayer (Limburg, Germany)
2018 Oct. 13.31 UT: m1=10.1, Dia.=3′, DC=4 ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [clouds, very near stars with m1: 9.90 and m1:10.85]
2018 Oct. 13.00 UT: m1=12.8 CCD, Dia.=0.57′, DC=6/ ... 0.20-m f/4 Schmidt-Newton + CCD ... S. Shurpakov (Observatory A98, Belarus)
2018 Oct. 12.12 UT: m1=12.5 CCD, Dia.=0.44′, DC=6/ ... 0.25-m f/4.7 Newton + CCD ... S. Shurpakov (Observatory C36, Belarus)
2018 Oct. 12.06 UT: m1=11.2, Dia.=1.5′, DC=4 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.48]
2018 Oct. 11.15 UT: m1=10.6, Dia.=2.6′, DC=3 ... 25.4-cm L f/5(64x) ... Maik Mayer (Limburg, Germany)
2018 Oct. 08.12 UT: m1=10.7, Dia.=1.9′, DC=2/ ... 25.4-cm L f/5 (64x) ... Maik Meyer (Limburg, Germany)
2018 Oct. 07.71 UT: m1=11.4, Dia.=3.2′, DC=5/ ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 07.07 UT: m1=10.7, Dia.=2′, DC=3, no tail ... 20-cm T(58x) ... Carlos Labordena (Castellón, España)
2018 Oct. 07.02 UT: m1=11.1, Dia.=1.7′, DC=3/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S]
2018 Oct. 06.77 UT: m1=10.9, Dia.=2.4′, DC=6 ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 06.23 UT: m1=10.5, Dia.=3′, DC=3 ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 06.14 UT: m1=10.5:, Dia.=2.4′, DC=2 ... 25.4-cm L f/5 (64x) ... Maik Meyer (Limburg, Germany)
2018 Oct. 04.99 UT: m1=13.2 CCD, Dia.=0.37′, DC=7/ ... 0.25-m f/4.7 Newton + CCD ... S. Shurpakov (Observatory C36, Belarus)
2018 Oct. 04.02 UT: m1=9.9, Dia.=5′, DC=2/ ... 20-cm SCT(100x) ... Juan Jose Gonzalez ( Aralla, Leon, Spain, Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Asymmetric coma. Altitude: 20 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 Sep. 22.04 UT: m1=11.7, Dia.=1′, DC=3 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.63]
2018 Sep. 22.00 UT: m1=13.6 CCD, Dia.=0.30′, DC=7/ ... 0.25-m f/4.7 Newton + CCD ... S. Shurpakov (Observatory C36, Belarus)
2018 Sep. 19.17 UT: m1=10.0, Dia.=6′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Mag. 12.1 (APASS) star in coma. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Sep. 18.74 UT: m1=12.4, Dia.=1.8’, DC=6 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, close to bright star. Small stellar central condensation. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 17.68 UT: m1=11.5, Dia.=1.3′, DC=6 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 17.02 UT: m1=12.4, Dia.=1′, DC=3 ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.44]
2018 Sep. 16.69 UT: m1=11.4, Dia.=2.3′, DC=4/ ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 15.00 UT: m1=14.0 CCD, Dia.=0.44′, DC=4/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)
2018 Sep. 10.17 UT: m1=9.9, Dia.=5′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Mag. 11.3 (TK) star in coma. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Aug. 24.02 UT: m1=14.7 CCD, Dia.=0.33′, DC=8 ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)
2018 Aug. 20.15 UT: m1=10.5, Dia.=5′, DC=2/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Aug. 18.76 UT: m1=12.9, Dia.=1.5’, DC=4 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse, moderately condensed semi-opaque centre. Does not appear to enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Aug. 18.03 UT: m1=14.3 CCD, Dia.=0.33′, DC=7/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Baran’, Belarus)
2018 Aug. 15.76 UT: m1=13.1, Dia.=1.6’, DC=2/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 15.17 UT: m1=10.9, Dia.=3′, DC=2/ ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Motion followed for a 75-min period. Astronomical twilight. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 Aug. 12.05 UT: m1=13.5, Dia.=0.6′, DC=0 ... 0.60-m f/4 L(244x, 305x) ... Gabor Santa (Tarján, Hungary) [coma is more diffuse in PA=240, but no tail visible, h=22 deg.]
2018 Aug. 10.17 UT: m1=11.5, Dia.=2.5′, DC=3 ... 20-cm SCT(133x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Brighter than expected. Astronomical twilight. Sidgwick method. Tycho-2 comparison stars. SQM: 20.5]
2018 Aug. 08.76 UT: m1=14.1, Dia.=1.2’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult ... diffuse coma, slightly brighter in centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

37P/Forbes 
2018 Sep. 19.06 UT: m=11.0, Dia.=7′, DC=1 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Faint tail difficult to separate from the coma. The bright estimate (11.0) is related to the 7′ observed width of the coma and tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2018 Sep. 17.75 UT: m1=[13.1, negative ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 16.74 UT: m1=[13.5, negative ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 09.97 UT: m=11.0, Dia.=6′, DC=1 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Faint tail difficult to separate from the coma. The bright estimate (11.0) is related to the 6′ observed width of the coma and tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2018 Aug. 20.10 UT: m1=10.5, Dia.=6′, DC=1 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Observation made under better conditions, providing a wider diameter and brighter magnitude estimate in comparison with my previous Aug. 15 observation. Faint tail difficult to separate from the coma. The bright estimate (10.5) is related to the 6′ observed width of the coma and tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2018 Aug. 17.03 UT: m1=17.1 CCD, Dia.=0.18′, DC=7 ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory С36, Baran’, Belarus)
2018 Aug. 15.73 UT: m1=13.7, Dia.=1’, DC=2/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult ... diffuse with slightly brighter but weakly condensed centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 15.01 UT: m1=11.2, Dia.=3′, DC=0/ ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 Aug. 12.03 UT: m1=14.0, Dia.=0.8′, DC=d2 ... 0.60-m f/4 L(305x) ... Gabor Santa (Tarján, Hungary) [diffuse, h=47 deg.]
2018 Aug. 10.97 UT: m1=14.2 CCD, Dia.=0.67′, DC=6/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Sergey Shurpakov (Observatory A98, Baran’, Belarus)
2018 Aug. 10.04 UT: m1=11.2, Dia.=3.5′, DC=0/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Very diffuse. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2, 21.6 at zenith]
2018 Aug. 08.74 UT: m1=13.5, Dia.=1.4’, DC=2/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 06.62 UT: m1=13.5, Dia.=2’, DC=2/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, very diffuse, weakly condensed. Visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 23.77 UT: m1=13.5, Dia.=1.5’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0. Method= S. Cat= AQ]
2018 July 22.12 UT: m1=10.5, Dia.=5′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Quintanilla de los Oteros, Leon, Spain. Alt. 860 m, 42º 19′ N, 5º 24′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2018 July 18.77 UT: m1=13.2, Dia.=1.2’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Slight interference from star at edge of coma. Comparison stars checked using APASS data in Guide 9.0. Method= S. Cat= AQ]
2018 July 18.09 UT: m1=11.0, Dia.=4.0′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 July 16.74 UT: m1=13.0, Dia.=1.3’, DC=2/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 14.01 UT: m1=13.8, Dia.=1.3′, DC=2 ... 60-cm L (244x) ... Sandor Szabo (Sopron, Hungary)
2018 July 13.74 UT: m1=12.9, Dia.=1.6’, DC=3/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to a weakly condensed opaque centre. Close to faint star. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 13.68 UT: m1=13.5, Dia.=1.0′, DC=3 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 11.75 UT: m1=13.5, Dia.=1.3’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 10.07 UT: m1=10.6, Dia.=4′, DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez ( lto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 June 23.76 UT: m1=12.1, Dia.=1.5’, DC=3/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Opaque centre, moderately condensed, slight interference from mag 13.7 star in Southern edge of coma. Does not enhance in Swan Band filter. Visible at x39 but very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 22.77 UT: m1=13.3, Dia.=1.7’, DC=5/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Hint of coma extension to the West, slight interference from mag 13.4 star nearby. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 19.11 UT: m1=10.3, Dia.=5′, DC=2/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.9. Beginning of astronomical twilight. Altitude: 26 deg.].
2018 June 17.33 UT: m1=12.7:, Dia.=1′, DC=4 ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [comet near a star wuth m1: 12.82]
2018 June 13.76 UT: m1=13.0, Dia.=2’, DC=3/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, inner coma opaque and sometimes appears faintly stellar. Faintly visible at x39 and with Neptune in the field. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 13.11 UT: m1=10.5, Dia.=4′, DC=2/ ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0. Beginning of astronomical twilight. Altitude: 21 deg. Mountain location, very clear sky]
2018 June 12.74 UT: m1=12.7, Dia.=1.7’, DC=4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, centre small and slightly more condensed. Faint extension of coma to the SW approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 11.70 UT: m1=12.5, Dia.=1.7’, DC=5/6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with opaque centre, hint of tail to NW approximately. Central condensation sometimes appears stellar in periods of good seeing. Faintly visible at x39. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  25.73 UT: m1=12.7, Dia.=1.7’, DC=4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  22.73 UT: m1=12.6, Dia.=1.5’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, faint stellar central condensation, coma extends to WSW approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  21.73 UT: m1=12.5, Dia.=1.7’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Faintly stellar, very diffuse. Faint elongation to the WSW approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  21.14 UT: m1=10.7, Dia.=4′, DC=2/ ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. Observation made under better conditions, from a higher mountain location, providing a wider coma diameter and brighter m1 estimate in comparison with my previous May 16.12 UT observation. Astronomical twilight. Altitude: 16 deg. SQM: 20.9]
2018 May  19.74 UT: m1=12.5, Dia.=1.6’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse with faint stellar central condensation. Outer coma appears elongated to the WSW approximately. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 May  18.74 UT: m1=12.4, Dia.=1.5’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Sometimes appears to have a faint stellar centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018  May 16.12 UT: m1=11.5, Dia.=1.5′, DC=2/ ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. APASS comparison stars. SQM: 20.7. Altitude: 10 deg.]
2018 May  10.64 UT: m1=12.5, Dia.=1.4’, DC=2/3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Poor seeing, low altitude = 17.8°. Coma very diffuse, weak centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 May  09.64 UT: m1=12.6, Dia.=1.3’, DC=2/3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight interference, elongation 10.6°. Coma diffuse, slightly brighter at centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 20.71 UT: m1=12.7, Dia.=1.1’, DC=4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult due to glare from bright star nearby ... small opaque centre, sometimes appears faintly stellar in periods of good seeing. Sky a little hazy due to encroaching fog. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Apr. 16.75 UT: m1=12.6, Dia.=1.8’, DC=3/4 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 15.74 UT: m1=12.9, Dia.=1.3’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan band filter. Coma small with slightly brighter and opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 14.69 UT: m1=13.8, Dia.=1’, DC=3 ... 25c-m L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia= [Difficult, coma close to faint stars. Coma circular in shape, slight brightening at centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Apr. 11.68 UT: m1=13.6, Dia.=0.8’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, very small and faint. Slight moonlight interference, moon altitude = 3.2°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

29P/Schwassmann-Wachmann 1
2018 Dec. 27.44 UT: m1=[14.6, Dia=–, DC=– ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.6 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I, Cat= AQ]
2018 Dec. 07.44 UT: m1=13.0, Dia.=1.5’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, poor seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Dec. 06.78 UT: m1=10.3, Dia.=6′, DC=2 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Faint and diffuse outer coma diameter: 6′, providing m=10.3 (TK), remnant of previous outbursts. Several stars inside this outer coma, the brightest being mag. 11.4 (TK). Tycho-2 comparison stars. Brighter inner coma diameter: 1′.3 at 133x, providing m=12.7 (AQ), in evolution after the recent outburst. Sidgwick method]
2018 Dec. 01.39 UT: m1=12.8, Dia.=1.2′, DC=2 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 30.39 UT: m1=12.5, Dia.=1.3′, DC=5 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 28.81 UT: m1=12.3, Dia.=2’, DC=2 ... 20-cm L f:4(66x) ... Martin Lehky (Czech Republic)
2018 Nov. 26.43 UT: m1=13.3, Dia.=1.2’, DC=5/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very faint stellar pseudo-nucleus, diffuse outer coma. Post outburst. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Nov. 11.43 UT: m1=12.9, Dia.=1.9’, DC=2 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, difficult. Moonlight. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 08.47 UT: m1=12.3, Dia.=4’, DC=2 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult. Interference by magnitude 12.7 star in coma. Coma large and diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 06.79 UT: m1=12.4, Dia.=2’, DC=2 ... 20-cm L f:4(106x) ... Martin Lehky (Czech Republic)
2018 Nov. 03.84 UT: m1=10.4, Dia.=5′, DC=2 ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Faint and diffuse outer coma diameter: 5′, providing m=10.4 (TK). This outer coma is a remnant of previous outbursts. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Nov. 03.40 UT: m1=12.5, Dia.=2.1’, DC=2 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, weakly condensed opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Oct. 30.43 UT: m1=12.3, Dia.=2.2’, DC=3 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, close to stars, weakly condensed and opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Oct. 29.43 UT: m1=12.2, Dia.=2.8’, DC=2/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse coma with slightly brighter and weakly condensed centre, close to mag 10.5 star. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Oct. 27.42 UT: m1=12.2, Dia.=2.3’, DC=2/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight hint of brightening to centre but weakly condensed. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Oct. 20.10 UT: m1=10.0, Dia.=6′, DC=2/ ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In evolution after the recent outbursts. Faint and diffuse outer coma diameter: 6′, providing m=10.0 (TK). Altitude: 11 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Oct. 16.83 UT: m1=12.5, Dia.=2′, DC=2 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.65]
2018 Oct. 16.02 UT: m1=10.2, Dia.=6′, DC=2/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In evolution after the recent outbursts. Brighter inner coma diameter: 3′, providing m=11.5 (AQ). Faint and diffuse outer coma diameter: 6′, providing m=10.2 (TK). Several stars inside the coma, the brightest being mag. 13.4 (AQ). Tycho-2 comparison stars. SQM: 21.2]
2018 Oct. 15.78 UT: m1=11.9, Dia.=2′, DC=2/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.19]
2018 Oct. 13.77 UT: m1=11.6, Dia.=1.7′, DC=3 ... 25.4-cm L f/5(104x) ... Maik Mayer (Limburg, Germany)
2018 Oct. 13.72 UT: m1=11.5, Dia.=1.4′, DC=3 ... 25-cm L F:5(70.5x, 150x) ... Danil Sidorko (Korenovsk, Russia)
2018 Oct. 11.74 UT: m1=12.0, Dia.=2′, DC=3 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.60]
2018 Oct. 11.72 UT: m1=11.6, Dia.=1.1′, DC=3 ... 25-cm L F:5(70.5x, 150x) ... Danil Sidorko (Korenovsk, Russia)
2018 Oct. 10.78 UT: m1=11.7:, Dia.=2′, DC=3 ... 25.4-cm L f/5 (104x) ... Maik Meyer (Limburg, Germany)
2018 Oct. 09.75 UT: m1=12.1, Dia.=1.5′, DC=2/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.60]
2018 Oct. 08.43 UT: m1=11.9, Dia.=2.7’, DC=4 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Post outburst. Does not enhance in Swan Band filter. Coma circular, opaque centre, moderately condensed. Semi-transparent outer coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Oct. 07.75 UT: m1=11.5, Dia.=3′, DC=2 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.48]
2018 Oct. 07.44 UT: m1=12.2, Dia.=1.6′, DC=3 ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 06.86 UT: m1=13.1 CCD, Dia.=0.59′, DC=5/ ... 0.25-m f/4.7 Newton + CCD ... S. Shurpakov (Observatory C36, Belarus)
2018 Oct. 06.53 UT: m1=12.2, Dia.=1.6′, DC=5 ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 05.80 UT: m1=11.5, Dia.=1.3′, DC=3 ... 25.4-cm L f/5 (104x) ... Maik Meyer (Limburg, Germany)
2018 Oct. 04.84 UT: m1=11.4, Dia.=2′, DC=4 ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S]
2018 Oct. 04.82 UT: m1=11.5, Dia.=1.3′, DC=3 ... 25.4-cm L f/5 (104x) ... Maik Meyer (Limburg, Germany)
2018 Oct. 03.87 UT: m1=10.3, Dia.=4′, DC=3 ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [In evolution after the recent outburst. Brighter inner coma diameter: 1.2′, providing m=11.4 (APASS). Faint and diffuse outer coma diameter: 4′, providing m=10.3. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 Oct. 01.76 UT: m1=11.7, Dia.=1.8′, DC=4 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, green zone, Lm=6.63]
2018 Oct. 01.42 UT: m1=12.2, Dia.=1.6’, DC=5/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Post outburst. Coma circular, semi-transparent outer coma. Opaque inner coma, faint stellaring visible in good seeing. No enhancement with Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 30.95 UT: m1=12.3, Dia.=1.2′, DC=6, no tail ... 23.5-cm SCT(138x) ... Carlos Labordena (Castellón, España)
2018 Sep. 30.74 UT: m1=11.5, Dia.=1.5′, DC=4 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.51]
2018 Sep. 29.79 UT: m1=11.4, Dia.=1.6′, DC=3/ ... 25.4-cm L 5 104x) ... Maik Meyer (Limburg, Germany)
2018 Sep. 29.77 UT: m1=12.0, Dia.=1.2′, DC=3/ ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.47]
2018 Sep. 27.39 UT: m1=12.2, Dia.=1.7’, DC=5/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Post outburst ... Does not enhance in Swan Band filter, faintly stellar in good seeing, visible at x39 but better resolved at x83. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 23.18 UT: m=12.4, Dia.=0.3′, DC=8 ... 20-cm SCT(100x) ... Juan Jose Gonzalez ( Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In outburst. Brighter inner coma diameter: 0.3′, providing m=12.4 (APASS). Faint and diffuse outer coma diameter : 4′, providing m=10.5:(Tycho-2). This faint outer coma is a remnant of previous outbursts. In-focus method. SQM: 20.4]
2018 Sep. 19.05 UT: m=11.1:, Dia.=5′, DC=1 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Faint and diffuse outer coma diameter: 5′, providing m=11.1: (TK). This faint outer coma is a remnant of previous outbursts. Sidgwick method. APASS comparison stars. SQM: 21.5]
2018 Sep. 18.72 UT: m1=[14.1, negative, Dia=–, DC=– ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible. Fainter than a 14.1 magnitude star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I, Cat= AQ]
2018 Sep. 09.96 UT: m=10.8:, Dia.=6′, DC=1/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Faint and diffuse outer coma diameter : 6′, providing m=10.8: (TK). This faint outer coma is a remnant of previous outbursts. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2018 Sep. 08.40 UT: m1=[14.3, negative ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.3 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I, Cat= AQ]
2018 Sep. 01.91 UT: m=10.8:, Dia.=5′, DC=1/ ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Brighter inner coma magnitude was difficult to estimate due to close mag. 11.7 (APASS) star. Faint and diffuse outer coma diameter: 5′, providing m=10.8: (TK). This faint outer coma is a remnant of previous outbursts. Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 Aug. 20.09 UT: m=10.7:, Dia.=5′, DC=1 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In evolution after the recent minor outburst. Brighter inner coma magnitude was difficult to estimate due to close mag. 11.7 (Tycho-2) star. Faint and diffuse outer coma diameter: 5′, providing m=10.7: (Tycho). This faint outer coma is a remnant of previous outbursts. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2018 Aug. 18.72 UT: m1=14.1, Dia.=0.8’, DC=2 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, difficult. Slightly brighter in centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 15.72 UT: m1=14.0, Dia.=0.9’, DC=2 ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 15.00 UT: m1=13.2, Dia.=0.9′, DC=5 ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In evolution after the recent minor outburst. Brighter inner coma diameter: 0.9′, providing m=13.2 (AQ). Faint and diffuse outer coma diameter: 3′.5, providing m=11.3: (AQ). This faint outer coma is a remnant of previous outbursts. Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 Aug. 08.73 UT: m1=14.1, Dia.=0.7’, DC=2/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 08.12 UT: m1=13.5, Dia.=0.7′, DC=6 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Observed after the recent minor outburst. Wider faint outer coma (diameter 3′) remnant from previous outbursts. Field stars checked in DSS. Sidgwick method. APASS comparison stars. SQM: 21.4 ... 21.5 at zenith]
2018 Aug. 06.61 UT: m1=14.0, Dia.= 1’, DC=2/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse. No stellaring visible. Limiting magnitude= 15.0 (star in-focus). Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 July 23.76 UT: m1=[14.9, negative ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.9 star in-focus. Comparison stars checked using APASS data in Guide 9.0. Method= I. Cat= AQ]
2018 July 22.11 UT: m1=12.0, Dia.=2.5′, DC=1/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Quintanilla de los Oteros, Leon, Spain. Alt. 860 m, 42º 19′ N, 5º 24′ W) [Field stars checked in DSS. Sidgwick method. APASScomparison stars. SQM: 21.4]
2018 July 20.74 UT: m1=[14.9, negative ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.9 star in-focus. Comparison stars checked using APASS data in Guide 9.0. Method= I. Cat: AQ]
2018 July 18.76 UT: m1=[14.9, negative ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.9 star in-focus. Comparison stars checked using APASS data in Guide 9.0. Method= I. Cat= AQ]
2018 July 18.06 UT: m1=12.3, Dia.=2.5′, DC=1/ ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [From dark mountain skies the comet shows a faint and very diffuse coma, remnant of previous outbursts. Field stars checked in DSS. Altitude: 38 deg. Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 July 16.74 UT: m1=[14.9, negative ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.9 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 July 14.03 UT: m1=15.0, Dia.=0.7′, DC=0 ... 60-cm L (305x) ... Sandor Szabo (Sopron, Hungary)
2018 July 13.73 UT: m1=[14.9 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.9 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 July 13.71 UT: m1=[13.5 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 11.74 UT: m1=[14.2, negative ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.2 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 July 09.63 UT: m1=[14.9 ... nmegative ... 25-cm L f:5 (166x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.9 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 June 22.78 UT: m1=[15.1, negative ... 25-cm L f:5 (166x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible. fainter than mag 15.1 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 June 13.77 UT: m1=[15.0, negative ... 25-cm L f:5 (166x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible. fainter than mag 15.0 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 June 12.75 UT: m1=[15.0, negative ... 25-cm L f:5 (166x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible. fainter than mag 15.0 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 June 11.70 UT: m1=[14.6, negative ... 25-cm L f:5 (166x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible. fainter than mag 14.6 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 May  25.75 UT: m1=[14.5 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible. Fainter than magnitude 14.5 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 May  21.75 UT: m1=[15.0, negative ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 15.0 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 May  19.75 UT: m1=[14.7, negative ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.7 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]
2018 May  18.76 UT: m1=[14.6, negative ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Not visible, fainter than magnitude 14.6 star in-focus. Comparison stars checked using APASS data in Guide 9.0, Method= I. Cat= AQ]

24P/Schaumasse 
2018 Feb. 10.70 UT: m1=13.0, Dia.=1.2’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight, difficult. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 20.70 UT: m1=13.3, Dia.=1’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Close to faint stars, weakly condensed. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Jan. 18.25 UT: m1=11.2, Dia.=4′, DC=1 ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. SQM: 21.2]
2018 Jan. 17.69 UT: m1=12.7, Dia.=1.4’, DC=2/3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 17.9. Does not enhance in Swan Band filter. Close to faint stars. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

21P/Giacobini-Zinner 
2018 Nov. 30.65 UT: m1=11.3, Dia.=1.3′, DC=3 ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 11.25 UT: m1=11.6, Dia.=1.5′, DC=2/ ... 22-cm L(160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 08.50 UT: m1=11.4, Dia.=3’, DC=1/ ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult to see, crowded star field. Low altitude= 16.6°, poor seeing. Coma shows very slight centre, very faint and diffuse outer coma. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Nov. 05.17 UT: m1=11.6, Dia.=1.5′, DC=2/ ... 22-cm L(160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 03.74 UT: m1=11.7, Dia.=1.6′, DC=1 ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 22.23 UT: m1= 10.0:, Dia.=2.5′, DC=3 ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)  [moonlight ... comet very near a star with m1: 8.28]
2018 Oct. 20.17 UT: m1=10.1, Dia.=2.5′, DC=3 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars.SQM: 20.8]
2018 Oct. 18.08 UT: m1=10.9, Dia.=1.5′, DC=3 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.61]
2018 Oct. 16.17 UT: m1=10.0, Dia.3′, DC=3 ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars.SQM: 20.8]
2018 Oct. 14.11 UT: m1=9.8, Dia.=1.8′, DC=2/ ... 25.4-cm L f/5(64x) ... Maik Mayer (Limburg, Germany)
2018 Oct. 13.23 UT: m1=9.0, Dia.=4′, DC=3/ ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 13.13 UT: m1=13.0 CCD, Dia.=0.37′, DC=6 ... 0.20-m f/4 Schmidt-Newton + CCD ... S. Shurpakov (Observatory A98, Belarus)
2018 Oct. 12.08 UT: m1=9.6, Dia.=3′, DC=4 ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.48]
2018 Oct. 11.16 UT m1=9.6, Dia.=2.2′, DC=3/ ... 25.4-cm L f/5(64x) ... Maik Mayer (Limburg, Germany)
2018 Oct. 08.13 UT: m1=8.9, Dia.=3.5′, DC=3 ... 25.4-cm L f/5 (64x) ... Maik Meyer (Limburg, Germany)
2018 Oct. 07.72 UT: m1=8.9, Dia.=5.5′, DC=3/ ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 07.10 UT: m1=8.8, Dia.=4′, DC=4, no tail ... 20-cm T(29x) ... Carlos Labordena (Castellón, España)
2018 Oct. 07.04 UT: m1=9.0, Dia.=6′, DC=4 ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S]
2018 Oct. 06.76 UT: m1=9.0, Dia.=5′, DC=4 ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 06.24 UT: m1=8.8, Dia.=5′, DC=4 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 06.25 UT: m1=8.9, Dia.=4.5′, DC=4/ ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 04.11 UT: m1=8.5, Dia.3′, DC=5, Tail= 0.3 deg. in PA: 280 deg. ... 25×100 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain, Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Moonlight interference (phase 0.31). Altitude: 22 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.5]
2018 Oct. 01.10 UT: m1=7.8, Dia.=8’, DC=4 ... 10×50 B ... Martin Lehky (Czech Republic)
2018 Oct. 1.06 UT: m1=10.1, Dia.=1.6′, DC=4 ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=5.73, moon 65%]
2018 Sep. 30.08 UT: m1=7.8, Dia.=8’, DC=4 ... 10×50 B ... Martin Lehky (Czech Republic)
2018 Sep. 29.16 UT: m1=8.0, Dia.=5′, DC=3, no tail ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Sep. 23.20 UT: m1=7.8, Dia.=5′, DC=5/, Tail= 1.1 deg. in PA: 280 deg. ... 25×100 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Zodiacal light. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Sep. 23.16 UT: m1=7.9, Dia.=5′, DC=5, Tail= 35′ ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Sep. 22.05 UT: m1=9.4 CCD, Dia.=1.18′, DC=7 ... 0.25-m f/4.7 Newton + CCD ... S. Shurpakov (Observatory C36, Belarus)
2018 Sep. 22.02 UT: m1=8.1, Dia.=6′, DC=5, Tail= 5 arcmin. in PA: 285 deg. ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.63]
2018 Sep. 20.08 UT: m1=7.3, Dia.=10’, DC=4 ... 10×50 B ... Martin Lehky (Czech Republic)
2018 Sep. 19.32 UT: m1=7.4, Dia.=5′, DC=5 ... 8.0-cm f/7.5 ED refractor (19x) ... Willian Souza (Sao Paulo, Brazil)
2018 Sep. 19.26 UT: m1=7.3, Dia.=5′, DC=6 ... 15×70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Sep. 19.18 UT: m1=7.6, Dia.=6′, DC=6/, Tail= 0.6 deg. in PA: 280 deg. ... 10×50 B ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Zodiacal light. Sidgwick method. Tycho-2 comparison stars.SQM: 21.2]
2018 Sep. 19.08 UT: m1=7.3, Dia.=10’, DC=4 ... 10×50 B ... Martin Lehky (Czech Republic)
2018 Sep. 18.76 UT: m1=8.5, Dia.=4.8’, DC=5/ ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances well in Swan band filter. Faint tail visible, traced to 23’ in length in P.A. 280° approximately. Strongly condensed central condensation, opaque fan-shaped outer coma to the West approximately tapering in brightness to the edges. Beautiful! Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Sep. 18.08 UT: m1=7.3, Dia.=10’, DC=4 ... 10×50 B ... Martin Lehky (Czech Republic)
2018 Sep. 17.71 UT: m1=6.8, Dia.=13′, DC=6 ... 10x70R ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 17.70 UT: m1=7.7, Dia.=8′, DC=7, Tail= 13′ in PA: 275 deg. ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 17.11 UT: m1=7.4, Dia.=10′, DC=4/ ... 10×50 B ... Maik Meyer (Limburg, Germany)
2018 Sep. 17.01 UT: m1=7.7, Dia.=4′, DC=5, Tail= 7 arcmin. in PA: 290 deg. ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.19]
2018 Sep. 16.67 UT: m1=6.9, Dia.=11′, DC=6 ... 10x70R ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 16.67 UT: m1=8.1, Dia.=6′, DC=7, Tail= 8.5′ in PA: 275 deg. ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 16.13 UT: m1=7.0, Dia.=10′, DC=4/ ... 10×50 B ... Maik Meyer (Limburg, Germany)
2018 Sep. 14.98 UT: m1=9.7 CCD, Dia.=1.77′, DC=6/ ... 0.20-m f/4 Newton + CCD ... Serguey Shurpakov (Observatory C36, Belarus)
2018 Sep. 13.75 UT: m1=7.2, Dia.=4′, Tail= 0.2degrees PA= 270 deg. ... 25×100 B ... David A. J. Seargent (Cowra, NSW, Australia) [Somewhat enhanced through Swan Band filter]
2018 Sep. 13.16 UT: m1=7.2, Dia.=6′, DC=5, Tail= 12′ ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Sep. 12.13 UT: m1=7.2, Dia.=10, DC=5 ... 10×50 B ... Maik Meyer (Limburg, Germany)
2018 Sep. 11.34 UT: m1=7.3, Dia.=6′, DC=5, Tail= 15 arcmin. in PA: 270 deg. ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Sep. 10.19 UT: m1=7.0, Dia.=5.0′, DC=6 ... 20×80 B ... J. P. Navarro Pina (Observatorio Astronomico Vega del Thader, MPC J70, Murcia, Spain)
2018 Sep. 10.16 UT: m1=7.2, Dia.=7′, DC=6/, Tail= 2.1 deg. in PA: 280 deg. ... 10×50 B ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55′ N, 5º 50′ W) [Zodiacal light. Sidgwick method. Tycho-2 comparison stars.SQM: 21.4]
2018 Sep. 09.78 UT: m1=8.0:, Dia.=4.2’, DC=6 ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain due to background star in coma. Coma enhances well in Swan Band filter. Faint, slightly curved tail visible, traced to 19’ in length in P.A. 282° approximately (Concave side to the North). Slight twilight interference. Rapid motion noticeable. Inner coma opaque and oval in shape, fades into tail extremity. Central condensation well condensed with a faint stellar pseudo-nucleus. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Sep. 09.33 UT: m1=7.2, Dia.=6′, DC=5/, Tail= 15 arcmin. in PA: 270 deg. ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Sep. 08.27 UT: m1=7.3, Dia.=5′, DC=5 ... 15×70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Sep. 08.10 UT: m1=7.3, Dia.=8.5′, DC=5 ... 10×50 B ... Maik Meyer (Limburg, Germany)
2018 Sep. 08.08 UT: m1=7.3, Dia.=6′, DC=5, Tail= 20′ ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Sep. 08.07 UT: m1=7.2, Dia.=6′, DC=4, Tail= 10′ ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Sep. 05.90 UT: m1=7.4, Dia.=6′, DC=5 ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=5.95]
2018 Sep. 05.35 UT: m1= 7.3, Dia.=6′, DC=5, Tail= 15 arcmin in PA: 270 deg. ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2018 Sep. 05.10 UT: m1=7.4, Dia.=5′, DC=6, Tail= 10′ ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Sep. 01.94 UT: m1=7.6, Dia.=5′, DC=6 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Sep. 01.93 UT: m1=7.4, Dia.=5′, DC=6/ ... 10×50 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 13 deg. In 25x100B : m1=7.7, Dia.=5′, DC=6, Tail= 0.3 deg. in PA: 270 deg., Sidgwick method. Tycho-2 comparison stars.SQM: 20.9]
2018 Sep. 01.92 UT: m1=8.8 CCD, Dia.=1.22′, DC=6/ ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory C36, Belarus)
2018 Aug. 31.86 UT: m1=8.8 CCD, Dia.=1.60′, DC=6/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)
2018 Aug. 27.35 UT: m1=7.3, Dia.=5′, DC=5 ... 20×100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Method: S. Moonlight. comet altitude: 13°]
2018 Aug. 25.01 UT: m1=7.8, Dia.=5′, DC=6, Tail= 6 arcmin, in PA: 270 deg. ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=5.36]
2018 Aug. 24.92 UT: m1=9.2 CCD, Dia.=1.77′, DC=7/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)
2018 Aug. 23.96 UT: m1=8.7 CCD, Dia.=1.77′, DC=6/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)
2018 Aug. 23.07 UT: m1=7.5, Dia.=9′, DC=5 ... 10×50 B ... Maik Meyer (Limburg, Germany)
2018 Aug. 22.95 UT: m1=7.5, Dia.=3′, DC=5, Tail= 8′ in PA: 255 deg. ... 25-cm L F:5(42x,70.5x) ... Danil Sidorko (Korenovsk, Russia)
2018 Aug. 22.95 UT: m1=8.6 CCD, Dia.=2.12′, DC=6/, Tail=17′ in PA: 259.7 deg. ... 0.15-m f/3.2 Volosov-Newton + CCD ... Serguey Shurpakov (Observatory C36, Belarus)
2018 Aug. 22.86 UT: m1=7.4, Dia.=8′, DC=6/ ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 21.88 UT: m1=7.6, Dia.=8′, DC=3 ... 13-cm L F:5(25x) ... Danil Sidorko (Korenovsk, Russia)
2018 Aug. 21.86 UT: m1=7.4, Dia.=8′, DC=6/ ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 20.86 UT: m1=7.5, Dia.=8′, DC=6/ ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2017 Aug. 20.08 UT: m1=7.4, Dia.=4′, DC=4, Tail= 0.1 deg. in PA 268 deg. ... 20×60 B ... José J. Chambó (Hoya Redonda, España)
2018 Aug. 20.03 UT: m1=7.5, Dia.=6′, DC=6/ ... 10×50 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In 25×100 B: m1=7.8, Dia.=5′, DC=6, Tail: 0.4 deg. in PA 260 deg, Sidgwick method. Tycho-2 comparison stars.SQM: 21.3]
2018 Aug. 19.86 UT: m1=7.5, Dia.=8′, DC=6/ ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 19.07 UT: m1=7.3, Dia.=9′, DC=5 ... 10×50 B ... Maik Meyer (Limburg, Germany)
2018 Aug. 18.86 UT: m1=7.7, Dia.=9′, DC=6/ ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 18.06 UT: m1=7.4, Dia,=9′, DC=4/ ... 10×50 B ... Maik Meyer (Limburg, Germany)
2018 Aug. 17.86 UT: m1=7.7, Dia.=9′, DC=6/ ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 17.83 UT: m1=9.3 CCD, Dia.=1.66′, DC=6/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)
2018 Aug. 16.87 UT: m1=8.0, Dia=6′, DC=6, Tail=10 arcmin in PA= 255 degrees ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.63]
2018 Aug. 16.86 UT: m1=7.8, Dia.=9′, DC=6/ ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 16.86 UT: m1=7.9, Dia=8′, DC=5/ ... 20×60 B ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone]
2018 Aug. 16.03 UT: m1=7.6, Dia.=9, DC=4/ ... 10×50 B ... Maik Meyer (Limburg, Germany):
2018 Aug. 15.12 UT: m1=8.0, Dia.=7′, DC=6, Tail=25′ ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Aug. 15.11 UT: m1=7.8, Dia.=7′, DC=5 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Aug. 15.09 UT: m1=7.7, Dia.=9′, DC=4/ ... 10×50 B ... Maik Meyer (Limburg, Germany) [Method: M, Cat: TK]
2018 Aug. 14.93 UT: m1=7.8, Dia.=8′, DC=6 ... 10×50 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In 25×100 B: m1=8.1, Dia.=6′, DC=5/, Tail= 0.6 deg. in PA 260 deg, Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 Aug. 13.80 UT: m1=8.4, Dia.=3.2′, DC=3, Tail= 6′ in PA: 260 deg. ... 25-cm L (70.5x) ... Danil Sidorko (Korenovsk, Russia)
2018 Aug. 13.44 UT: m1=7.9, Dia.=7′, DC=4, Tail= 0.2 deg. in PA: 250 deg. ... 20×80 B ... Man-To Hui (Mt. Pinos, CA, USA)
2018 Aug. 13.04 UT: m1=7.9, Dia.=7′, DC=5 ... 10×50 B ... Maik Meyer (Limburg, Germany) [method M]
2018 Aug. 12.98 UT: m1=8.4, Dia.=9.0′, DC=4/ ... 20×80 B ... Marek Biely (Brno, 226 m.a.s.l., Czech Republic)
2018 Aug. 12.86 UT: m1=7.7, Dia.=9′, DC=6 ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 12.81 UT: m1=8.0, Dia.=4′, DC=6, Tail= 8 arcmin. in PA: 260 deg. ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.42]
2018 Aug. 12.02 UT: m1=7.8, Dia.=7, DC=4 ... 10×50 B ... Maik Meyer (Limburg, Germany)
2018 Aug. 11.95 UT: m1=7.9, Dia.=7′, DC=6 ... 10×50 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In 25×100 B: m1=8.1, Dia.=7′, DC=5/, Tail: 0.4 deg. in PA: 250 deg, Sidgwick method. Tycho-2 comparison stars. SQM: 21.2. 21.3 at zenith]
2018 Aug. 11.93 UT: m1=7.3, m2=11.5, Dia.=10′, DC=S6, Tail=30′ to PA:270 deg. ... 10×50 B ... 0.20-m L(29x), 0.60-m f/4 L(188x) … Gabor Santa (Tarján, Hungary) [Very-very bright, very easy to see, strong nucleus, fan-shape outflow from the nucleus toward the Sun, big outer coma, broad, bright tail, h=48deg. NELM=6.5]
2018 Aug. 11.89 UT: m1=9.1, Dia.=2.5′, DC=3 ... 10-cm B(25x) ... Marian Legutko (Gliwice, Poland) [mostly cloudy, poor transparency]
2018 Aug. 11.86 UT: m1=7.8, Dia.=9′, DC=6 ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 11.06 UT: m1=8.3, Dia.=7′, DC=5, Tail=15′ ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Aug. 11.05 UT: m1=8.2, Dia.=7′, DC=4 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Aug. 10.89 UT: m1=8.6 CCD, Dia=2.10′ DC=7 ... 0.20-m f/4 Schmidt-Newton + CCD ... Sergey Shurpakov (Observatory A98, Baran’, Belarus)
2018 Aug. 09.93 UT: m1=8.6, Dia.=6′, DC=5/ ... 25×100 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In 20 cm SCT (77x): m1=9.0, Dia.=6′, DC=5/, Tail: 0.2 deg. in PA: 250 deg, Sidgwick method. Tycho-2 comparison stars. SQM: 21.3. 21.6 at zenith]
2018 Aug. 09.91 UT: m1=8.8, Dia.=4.7′, DC=5/ ... 20×80 B ... Marek Biely (Brno, 226 m.a.s.l., Czech Republic)
2018 Aug. 09.86 UT: m1=7.8, Dia.=8′, DC=6 ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 08.82 UT: m1=8.4, Dia.=5′, DC=6, Tail= 7 arcmin., in PA: 255 deg. ... 25.4-cm L (48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.48]
2018 Aug. 07.94 UT: m1=8.0, Dia.=12′, DC=6 ... 10×50 B ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In 25x100B : m1=8.5, Dia.=7′, DC=5/. In 20 cm SCT (77x): m1=8.9, Dia.=7′, DC=5, Tail: 0.15 deg. in PA 250 deg, Sidgwick method. Tycho-2 comparison stars. SQM: 21.3, 21.5 at zenith]
2018 Aug. 07.86 UT: m1=8.0, Dia.=8′, DC=5/ ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 06.86 UT: m1=8.0, Dia.=8′, DC=5/ ... 10×50 B, Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 05.97 UT: m1=8.7, Dia.=5′, DC=4 ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Aug. 05.91 UT: m1=8.9, Dia.=5′, DC=6, Tail= 9 arcmin. in PA: 235 deg. ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, green zone, Lm=6.47]
2018 Aug. 05.86 UT: m1=8.1, Dia.=8′, DC=5 ... 10×50 B ... Martin Lehky ((Hradec Kralove, Czech Republic)
2018 Aug. 04.30 TU: m1=8.0, Dia.=15′, DC=1 ... 20×80 B ... Charles S. Morris (Fillmore, CA, USA) [Observation was at moonrise. Comet was much larger and more diffuse than reported by others. Comet was also observed in 10x50B with similar results. Tz=5.0+]
2018 Aug. 03.91 UT: m1=9.3, Dia.=4.4′, DC=4 ... 20×80 B ... Marek Biely (Brno, 226 m.a.s.l., Czech Republic) [Already visible]
2018 Aug. 03.88 UT: m1=9.6, Dia.=4′, DC=4 ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Aug. 03.13 UT: m1=8.4, Dia.=1.7′, DC=4/ ... 0.20-m f/4 Schmidt-Newton ... Sergey Shurpakov (Observatory A98, Baran’, Belarus)
2018 Aug. 02.97 UT: m1=10.1 CCD, Dia.=1.77′, DC=6/, Tail=9.6′ in PA:228 deg. ... 0.20-m f/4 Schmidt-Newton + CCD ... Sergey Shurpakov (Observatory A98, Baran’, Belarus)
2018 Aug. 01.94 UT: m1=9.1, Dia.=3′, DC=5/ ... 25.4-cm L (48x) ... Alexsandr Morozov (Novozybkov, Russia) [method S]
2018 Aug. 01.92 UT: m1=8.7, Dia.=8′, DC=5, Tail=3′ in PA=225 deg. ... 12.7-cm L(25x) ... Valentín Díaz (La Romana, Alicante, España)
2018 Aug. 01.92 UT: m1=9.3, Dia.=5′, DC=5 ... 20-cm SCT (77x): Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2018 July 30.92 UT: m1=9.4, Dia.=2.5′, DC=5/ ... 25.4-cm L (48x) ... Alexsandr Morozov (Novozybkov, Russia) [method S]
2018 July 30.90 UT: m1=10.0 CCD, Dia.=1.66′, DC=7, Tail=6.7′ in PA=230 deg. ... 0.20-m f/4 Schmidt-Newton + CCD ... Sergey Shurpakov (Observatory A98, Baran’, Belarus)
2018 July 25.99 UT: m1=9.9, Dia.=2.5′, DC=5 ... 25.4-cm L (48x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, green zone, Lm=5.96]
2018 July 24.04 UT: m1=9.1, Dia.=3.5′, DC=4/ ... 12.0-cm R f:5 (30x) ... Maik Meyer (Limburg, Germany)
2018 July 23.95 UT: m1=10.4 CCD, Dia.=0.94′, DC=6/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Sergey Shurpakov (Observatory A98, Baran’, Belarus)
2018 July 23.48 UT: m1=9.4, Dia.=5′, DC=5, … 20×80 B … Man To Hui (Mt. Pinos, CA, USA) [twilight]
2018 July 22.88 UT: m1=10.0, Dia.=2′, DC=5/ ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, green zone]
2018 July 22.10 UT: m1=9.5, Dia.=4′, DC=4 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Quintanilla de los Oteros, Leon, Spain. Alt. 860 m, 42º 19′ N, 5º 24′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 July 21.92 UT: m1=9.9, Dia.=2′, DC=2 ... 12.7-cm T F/12(60x) ... Marian Legutko (Gliwice, Poland) [partly cloudy]
2018 July 19.00 UT: m1=9.6, Dia.=2.5′, DC=D5 ... 25.4-cm L f:5 (64x) ... Maik Myer (Limburg, Germany)
2018 July 18.04 UT: m1=9.9, Dia.=4′, DC=4 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 July 17.99 UT: m1=9.9, Dia.=3.0′, DC=D5 ... 25.4-cm L f:5 (64x) ... Maik Meyer (Eppenrod, Limburg, Germany)
2018 July 17.89 UT: m1=10.2, Dia.=2′, DC=4/ ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, green zone]
2018 July 16.99 UT: m1=9.9, Dia.=4.0′, DC=D5 ... 25.4-cm L f:5 (64x) ... Maik Meyer (Eppenrod, Limburg, Germany)
2018 July 14.99 UT: m1=9.8, Dia.=2.8′, DC=4 ... 25.4-cm L f:5 (64x) ... Maik Meyer (Eppenrod, Limburg, Germany)
2018 July 14.07 UT: m1=10.0, Dia.=3.5′, DC=3 ... 20-cm T(80x) ... Carlos Labordena (Castellón, España) [no tail]
2018 July 13.98 UT: m1=10.0, Dia.=2.8′, DC=4 ... 12.0-cm R f:5 (30x) ... Maik Meyer (Limburg, Germany)
2018 July 13.97 UT: m1=10.1, Dia.=2.4′, DC=3/ ... 25.4-cm L f:5 (64x) ... Maik Meyer (Limburg, Germany)
2018 July 13.95 UT: m1=10.4, Dia.=0.9′, DC=6 ... 60-cm L (116x) ... Sandor Szabo (Sopron, Hungary) [Tail= is 3.5’ to PA: 235 deg.]
2018 July 13.50 UT: m1=10.0, Dia.=4′, DC=5 ... 40.0-cm L f/4.5 (36x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 12.89 UT: m1=10.1, Dia.=1.5′, DC=5, Tail= 1.7 arcmin. in PA: 225 deg. ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, green zone, Lm=6.63]
2018 July 09.97 UT: m1=10.3, Dia.=3.5′, DC=3/ ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 July 09.91 UT: m1=10.4, Dia.=1.5′, DC=4/, Tail=2′ PA=220 deg. ... 25.4-cm L(120x) ... Alexsandr Morozov, (Novozybkov, Russia) [Method S, green zone]
2018 July 08.96 UT: m1=10.4, m2=14.3, Dia.=1.4’, DC=s6, Tail=10′ towards PA: 215 deg. ... 35-cm L (69x) ... Gábor Sánta (Göd, county Pest, Hungary) [h=70 deg., NELM=5,9. Great comet! Nucleus is 14.3 magnitudes, inner coma is round, this surrounded by a drop-like structure, outer coma is elongated. Tail is straight, its lenght is 10 arcminutes, first 4-5′ is very obvious. Tail best seen with 165x (Baader Classic Ortho 10 mm)]
2018 July 06.97 UT: m1=10.2, Dia.=3.5′, DC=3 ... 20-cm T(80x) ... Carlos Labordena (Castellón, España)
2018 July 06.96 UT: m1=11.1, Dia.=1.4′, DC=4 ... 30-cm L(107x) ... Valentín Díaz (Xorret de Cati, Alicante, España)
2018 July 06.90 UT: m1=10.8, Dia.=1.5′, DC=4/ ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia) [Method S, green zona pollution]
2018 July 05.95 UT: m1=10.4, Dia.=3′, DC=3 ... 20-cm T(80x) ... Carlos Labordena (Castellón, España)
2018 July 04.94 UT: m1=10.7, Dia.=2.2′, DC=3/ ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Kralove, Czech Republic)
2018 July 04.90 UT: m1=11.3, Dia.=1′, DC=4 ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia) (Method S, green zona pollution)
2018 July 03.97 UT: m1=10.2, Dia.=3.5′, DC=3 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Villar del Yermo, Leon, Spain. Alt. 805 m, 42º 20′ N, 5º 42′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2018 July 03.94 UT: m1=10.7, Dia.=2.5′, DC=3 ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Kralove, Czech Republic)
2018 July 02.94 UT: m1=10.9, Dia.=2.5′, DC=3/ ... 20-cm L f:4 (42x) ... Martin Lehky (Hradec Kralove, Czech Republic)
2018 June 23.73 UT: m1=12.2, Dia.=1.5’, DC=3/ ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 12.5°, Difficult due to faint background star in coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 22.73 UT: m1=12.3, Dia.=1’, DC=6 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult due to nearby star. Low altitude = 12.9°. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 June 17.05 UT: m1=13.0, Dia.=0.9′, DC=4 ... 25-cm L(126x) ... Valentín Díaz (Puebla de Don Fadrique, Granada, España)
2018 June 16.96 UT: m1=12.4, Dia.=1.5′, DC=3 ... 20-cm T(113x) ... Carlos Labordena (Castellón, España)
2018 June 13.90 UT: m1=12.6, Dia.=1′, DC=3/ ... 25.4-cm L (120x) ... Alexsandr Morozov (Novozybkov, Russia)
2018 June 13.74 UT: m1=12.5, Dia.=1.2’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with brightening to weakly condensed centre. Low altitude = 18.3°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 June 13.02 UT: m1=12.2, Dia.=1.5′, DC=3/ ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47′ N, 6º 00′ W) [Sidgwick method. APASS comparison stars. SQM: 21.2]
2018 June 11.72 UT: m1=12.5, Dia.=1.5’, DC=3 ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 19.8°. Diffuse, difficult to see in crowded star field, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 May 28.93 UT: m1=15.3 CCD, Dia.=0.29′, DC=6/ ... 0.25-m f/4.7 Newton + CCD ... Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2018 May 25.97 UT: m1=15.6 CCD, Dia.=0.22′, DC=7/ ... 0.25-m f/4.7 Newton + CCD ... Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2018 May 21.95 UT: m1=16.3 CCD, Dia.=0.39′, DC=7/ ... 0.20-m f/4 Schmidt-Newton + CCD ... Sergey Shurpakov (Observatory A98, Baran’, Belarus)
2018 May 19.96 UT: m1=16.0 CCD, Dia.=0.18′, DC=7/, Tail=0.30′ in PA:240 deg. ... 0.25-m f/4.7 Newton + CCD ... Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2018 May 08.03 UT: m1=16.1 CCD, Dia.=0.26′, DC=7/ ... 0.25-m f/4.7 Newton + CCD ... Sergey Shurpakov (Observatory C36, Baran’, Belarus)
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