C/2016 M1 (PANSTARRS)

C/2016 M1 (PANSTARRS)
Reported observations:
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, ... 25x100 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, ... 20x100 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/, ... 20x100 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. 08.40 UT: m1=14.1, Dia.=0.6’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult. Small diffuse coma. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
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, ... 25x100 B ... 25x100 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, ... 20x100 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/, ... 20x100 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/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 July 04.50 UT: m1=9.0, Dia.=4.0', DC=4, ... 25x100 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, ... 20x100 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, ... 10x50 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/, ... 25x100 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/, ... 20x100 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/, ... 20x100 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/, ... 20x100 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 7x50 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/, ... 25x100 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, ... 30x125 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, ... 30x125 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, ... 30x125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 June 06.07 UT: m1=9.1, Dia.=4', DC=4, ... 20x100 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, ... 30x125 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-cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil) [moonlight]
2018 May  29.36 UT: m1=9.6:, DC=4, ... 9-cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil) [moonlight]
2018 May  28.36 UT: m1=9.5, Dia.=2', DC=5, ... 9-cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 May  27.46 UT: m1=9.4, Dia.=3', DC=4, ... 30x125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 May  27.36 UT: m1=9.6, Dia.=1', DC=5, ... 9-cm 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, ... 30x125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 May  24.36 UT: m1=9.8, Dia.=1', DC=5, ... 9-cm 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, ... 30x125 B ... Carl Hergenrother (Tucson, AZ, USA)
2018 May  22.36 UT: m1=9.8, Dia.=1'.5, DC=5, ... 9-cm 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-cm 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/, ... 25x100 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, ... 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, ... 30x125 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, ... 30x125 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-cm f/10 (36x) ... Alexandre Amorim (Florianopolis, Brazil)
2018 May  13.14 UT: m1=9.6, Dia.=4', DC=4, ... 20-cm SCT(50x) ... Carlos Labordena (Castellón, España)
2018 May  12.46 UT: m1=9.9:, Dia.=4', DC=5, ... 30x125 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, ... 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, ... 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.]
2017 Nov. 14.75 UT: m1=14.0, Dia.=0.5', DC=3, ... 60-cm L (244x) ... Sandor Szabo (Hungary) [Very close to a 13.9 mag star, but easily seen]
2017 Nov. 14.70 UT: m1=13.7, Dia.=0.6', DC=d4-5, ... 0.40-m L f/4.4 (360x) ... Gabor Santa (Göd, Hungary) [comet is easy to see, round, with disk-like condensation. 32 deg above horizon, nelm=5.0]
2017 Oct. 26.40 UT: m1=[13.9, ... 40.0-cm L f/4.5 (257x) ... Seiichi Yoshida (Gunma, Japan)
2017 Oct. 13.77 UT: m1=14.0, Dia.=0.5', DC=3-4, ... 0.40-m Dobsonian f/4.4 (257x) ... Gabor Santa (relatively big and diffuse, difficult to see Hungary) [easy to see]
2017 Sep. 22.82 UT: m1=14.5, Dia.=0.5’, DC=5, ... 60-cm reflector (305x) ... Sandor Szabo (Sopron, Hungary)
2017 Aug. 21.83 UT: m1=14.8, Dia.=0.33', DC=0, ... 0.35-m L (351x) ... Gabor Santa (Hungary) [Coma is diffuse but very obvious]
2017 Apr. 20.00 UT: m1=16.7 CCD, Dia.=0.20', DC=7/, ... 0.25-m f/4.7 reflector + CCD ... Sergey Shurpakov (Observatory C36, Baran', Belarus)
2017 Apr. 04.99 UT: m1=16.8 CCD, Dia.=0.37', DC=7/, ... 0.25-m f/4.7 reflector + CCD ... Serguey Shurpakov (Observatory C36, Baran', Belarus)
2017 Mar. 16.99 UT: m1=16.8 CCD, Dia.=0.28', DC=8, ... 0.25-m f/4.7 reflector + CCD ... S. Shurpakov (Observatory C36, Baran', Belarus)
2017 Mar. 13.99 UT: m1=16.8 CCD, Dia.=0.37', DC=8/, ... 0.25-m f/4.7 reflector + CCD ... S. Shurpakov (Observatory C36, Baran', Belarus)
Advertisements