C/2015 V2 (Johnson)

C/2015 V2 (Johnson)
Reported observations:
2017 Oct. 19.45 UT: m1=12.2, Dia.=1.7’, DC=2, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre but very weak. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 12.40 UT: m1=12.3, Dia.=1.7’, DC=4, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma does not enhance in Swan Band filter. Coma small with a moderately condensed and opaque centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 22.47 UT: m1=10.9, Dia.=3.9’, DC=2, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight interference by background star in coma. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 19.43 UT: m1=11.4:, Dia.=3.3’, DC=2/3, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain; stars in coma. Coma very diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 15.41 UT: m1=11.0:, Dia.=2.4’, DC=3, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain; close to bright star pairing, difficult to separate from stars. Coma diffuse with opaque centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 07.93 UT: m1=10.4, Dia.=3', DC=3, ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Aug. 23.43 UT: m1=10.3, Dia.=4.2’, DC=5, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 22.04 UT: m1=9.7, Dia.=4', DC=3, ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Aug. 19.42 UT: m1=10.5, Dia.=3.5’, DC=5, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed centre, enhances slightly in Swan band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 17.41 UT: m1=10.1, Dia.=3.2’, DC=5, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma centre well condensed, enhances slightly in Swan band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 14.43 UT: m1=10.1, Dia.=4.8’, DC=5/6, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, faintly extended to the North approximately. Faint stellar central condensation visible in periods of good seeing. Dims in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 12.39 UT: m1=9.9, Dia.=4.5’, DC=5/6, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma fanned to the North approximately, opaque inner coma with faint stellar central condensation visible in periods of good seeing. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 10.97 UT: m1=9.2, Dia.=6', DC=2, ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Aug. 10.36 UT: m1=9.8, Dia.=3’, DC=5/6, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse and appears fan shaped to the North approximately; Inner coma opaque with small faint stellar central condensation visible in periods of good seeing. Coma dims slightly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 July 26.06 UT: m1=8.5, Dia.=7', DC=3, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 July 25.42 UT: m1=9.6, Dia.=4’, DC=6, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma dims in Swan Band filter, elongated slightly to the NE. Faint stellar central condensation surrounded by an opaque inner coma and fading to semi-transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 July 22.92 UT: m1=7.8, Dia.=8', DC=3, ... 25x100 B ... Juan Jose Gonzalez (Alto del Trichero - Soto y Amio, Leon, Spain; Alt. 1190 m, 42º 46' N, 5º 53' W) [Altitude: 7 deg. Several stars in coma, the brightest being mag 9.4 (TK). Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2017 July 20.42 UT: m1=8.8, Dia.=10.3’, DC=3, ... 11x70 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 July 19.89 UT: m1=8.4, Dia=6', DC=3, no tail, ... 20-cm SCT (50x) ... Carlos Labordena (Castellón, España)
2017 July 15.00 UT: m1=8.2, Dia.=8', DC=3, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 July 14.93 UT: m1=7.7, Dia.=10', DC=3/, ... 25x100 B ... Juan Jose Gonzalez (Alto del Castro - Aralla, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 July 14.86 UT: m1=9.3, Dia.=4', DC=3, ... 30.5-cm L f:5 (97x) ... J. P. Navarro Pina (Campos del Rio, Murcia, Spain)
2017 July 11.38 UT: m1=8.5, Dia.=16’, DC=3, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Moonlight. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 June 30.60 UT: m1=7.9, Dia.=12.9’, DC=3/4, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, a little interference by background stars. Low altitude = 19.8°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 29.87 UT: m1=8.6, Dia.=5', DC=3, ... 13-cm L (65x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 June 28.07 UT: m1=7.7, Dia.=12', DC=3, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 28.06 UT: m1=7.9, Dia.=10', DC=3/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 27.84 UT: m1=8.3, Dia.=5.9', DC=4, ... 25-cm L (42x, 70x) ... Danil Sidorko (Korenovsk, Russia) [SQM= 20.22]
2017 June 26.97 UT: m1=8.0:, Dia.=10', DC=3, ... 7x50 B ... Willian Souza (Rheinsberg, Germany)
2017 June 26.87 UT: m1=8.2, Dia.=10', DC=5, ... 20x80 B ... Marek Biely (244 m.a.s.l., Brno, Czech Republic) [Still also a hint of tail visible]
2017 June 26.83 UT: m1=8.3, Dia.=5.5', DC=4/, ... 25-cm L (42x, 70x) ... Danil Sidorko (Korenovsk, Russia) [SQM= 21.29]
2017 June 26.50 UT: m1=8.1, Dia.=13’, DC=3/4, ... 7x50 B ... Chris Wyatt (Moonbi, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 24.98 UT: m1=7.8, Dia.=10’, DC=2, no tail, ... 10x50 B ... Alberto Anunziato (Paraná, Argentina) [Met. Sidgwick, Cat. Tycho II. Estrellas de comparación; HIP 69572 y 69414]
2017 June 24.92 UT: m1=8.5, Dia.=5', DC=3/, ... 25x100 B ... Martin Lehky (Czech Republic)
2017 June 24.45 UT: m1=8.3, Dia.=10.6’, DC=3, ... 10x50 R ... Chris Wyatt (Moonbi, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 23.92 UT: m1=8.6, Dia.=4', DC=3/, ... 25x100 B ... Martin Lehky (Czech Republic)
2017 June 23.90 UT: m1=8.0, Dia.=8', DC=4, Tail= 11', ... 15-cm T (30x) ... Carlos Labordena (Castellón, España)
2017 June 23.05 UT: m1=7.7, Dia.=12', DC=3, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 23.04 UT: m1=7.8, Dia.=10', DC=3/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 22.46 UT: m1=7.7, Dia.=13’, DC=3, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 22.12 UT: m1=7.8, Dia.=10', DC=3/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 21.88 UT: m1=10.7 CCD, Dia.=1.30', DC=6/, ... 15-cm reflector f/3.2 ... Sergey Shurpakov (Baran’, Belarus)
2017 June 21.52 UT: m1=7.7, Dia.=16.5’, DC=4, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Slight enhancement in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 21.00 UT: m1=7.1, Dia.=15', DC=3/, ... 12x45 monocular ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º 48' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2017 June 20.92 UT: m1=8.5, Dia.=5', DC=3/, ... 25x100 B ... Martin Lehky (Czech Republic)
2017 June 20.83 UT: m1=8.2, Dia.=6.2', DC=3/, ... 25-cm L (42x, 70x) ... Danil Sidorko (Korenovsk, Russia) [SQM = 21.29]
2017 June 20.49 UT: m1=7.5:, ... 10x50 B ... David A. J. Seargent (Cowra, NSW, Australia) 
2017 June 20.44 UT: m1=7.9, Dia.=12.5’, DC=3/4, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight interference from nearby stars. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 19.92 UT: m1=8.4, Dia.=4', DC=4, ... 25x100 B ... Martin Lehky (Czech Republic)
2017 June 19.87 UT: m1=8.0, Dia.=5', DC=4/, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia) [Morris's method, green zone]
2017 June 18.98 UT: m1=8.4, Día.=5´, DC=3, ... 25-cm L (66x) ... Gonzalo Vargas (Cochabamba, Bolivia) [Se observó alargamiento abierto como abanico de la coma entre un ángulo AP de 46 a 51 grados aproximadamente]
2017 June 18.92 UT: m1=8.4, Dia.=4', DC=4, ... 25x100 B ... Martin Lehky (Czech Republic)
2017 June 16.90 UT: m1=8.2, Dia.=8', DC=5, ... 20x80 B ... Valentín Díaz (La Romaneta, Alicante,España)
2017 June 16.90 UT: m1=10.0 CCD, Dia.=2.05', DC=6/, ... 15-cm reflector f/3.2 ... Sergey Shurpakov (Baran’, Belarus)
2017 June 16.83 UT: m1=8.3, Dia.=5.5', DC=3, Tail= 7' in PA: 330 deg., ... 25-cm L (42x, 70x) ... Danil Sidorko (Korenovsk, Russia) [SQM = 20.37]
2017 June 15.37 UT: m1=7.6, Dia.=13.1’, DC=3, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre, semi-transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 June 14.94 UT: m1=7.2, Dia.=15', DC=3/, Tail= 0.5 deg. in PA: 340 deg., ... 12x45 monocular ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º 48' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2017 June 14.90 UT: m1=7.8, Dia.=6.5, DC=4/, ... 10.0-cm B(29x) ... Maik Meyer (Limburg, Germany)
2017 June 14.88 UT: m1=8.3:, Dia.=3.5', DC=4... 20 cm L, 37x, F/6...Marian Legutko (Gliwice, Poland), [bright sky, partly cloudy; Sidgwick method]
2017 June 13.90 UT: m1=8.5, Dia.=6', DC=4, Tail= 10', ... 20-cm SCT (50x) ... Carlos Labordena (Castellón, España)
2017 June 13.87 UT: m1=7.9, Dia.=6', DC=4/, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 June 12.92 UT: m1=8.2, Dia.=5', DC=4, ... 25x100 B ... Martin Lehky (Czech Republic)
2017 June 12.86 UT: m1=10.1, Dia.=5', DC=6, ... 30.5-cm L f/4.9 (97x) ... J. P. Navarro Pina (Cañadas de San Pedro, Murcia, Spain) [Sidgwick method. Lm=5.7]
2017 June 11.94 UT: m1=8.2, Dia.=10', DC=3/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 09.97 UT: m1=10.0 CCD, Dia.=1.86', DC=6/, ... 15-cm reflector f/3.2 ... Sergey Shurpakov (Baran’, Belarus)
2017 June 04.89 UT: m1=8.0, ... 10-cm R (34x) ... Willian Souza (Sao Paulo, Brazil)
2017 June 03.89 UT: m1=8.0:, ... 10-cm R (34x) ... Willian Souza (Sao Paulo, Brazil)
2017 June 02.97 UT: m1=7.6, Dia.=9', DC=4, ... 10x50 B ... Martin Lehky (Czech Republic)
2017 June 02.89 UT: m1=8.0:, ... 10-cm R (34x)... Willian Souza (Sao Paulo, Brazil)
2017 June 02.17 UT: m1=7.5, Dia.=12', DC=3/, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 02.16 UT: m1=7.7, Dia.=8', DC=4/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 01.97 UT: m1=7.5, Dia.=8', DC=4/, ... 10.0-cm B(29x) ... Maik Meyer (Limburg, Germany)
2017 May  31.94 UT: m1=7.6, Dia.=10, DC=4, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  31.88 UT: m1=9.3 CCD, Dia.=3.21', DC=6/, Tail= 20' in PA: 329 deg., ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  31.86 UT: m1=7.5, Dia.=2.8', DC=4/, ... 11-cm B(20x) ... Sergey Shurpakov (Baran', Belarus)
2017 May  30.87 UT: m1=7.6, Dia.=6', DC=5/, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 May  30.13 UT: m1=7.8, Dia.=6', DC=4, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 May  30.01 UT: m1=7.6, Dia.=11', DC=5, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  28.87 UT: m1=8.0:, Dia.=4', DC=5, ... 20-cm L F/6 (37x) ... Marian Legutko (Gliwice, Poland) [bright sky, moderate transparency, increasing cloudcover; no tail visible; Morris method]
2017 May  28.94 UT: m1=7.6, Dia.=11', DC=5, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  27.94 UT: m1=7.7, Dia.=10', DC=4/, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  27.88 UT: m1=8.2:, Dia.=4', DC=5, ... 20-cm L F/6 (37x) ... Marian Legutko (Gliwice, Poland) [bright sky, moderate transparency; no tail visible; Morris method]
2017 May  27.85 UT: m1=7.8, Dia.=5.4', DC=4, Tail= 8' in PA 315 deg., ... 25-cm L (42x, 70x) ... Danil Sidorko (Korenovsk, Russia) [SQM= 20.51]
2017 May  27.84 UT: m1=7.8, Dia.=8', DC=4, ... 6-cm B (20x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 May  27.42 UT: m1=7.5, Dia.=15’, DC=4, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre, moderately condensed. Coma extended to NW approximately. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  27.13 UT: m1=7.8, Dia.=6', DC=4, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 May  26.90 UT: m1=7.7, Dia.=13', DC=4/, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  26.49 UT: m1=7.7, Dia.=10.0, ... 10x50 B ... David A. J. Seargent (Cowra, NSW, Australia)
2017 May  26.48 UT: m1=7.6, Dia.=12.1’, DC=4, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, gradual brightening to centre, coma extended to the NW approximately. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  26.01 UT: m1=7.7, Dia.=13', DC=4/, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  25.96 UT: m1=7.3, Dia.=18', DC=7, ... 8x56 B ... Alex Scholten (Eerbeek, Netherlands)
2017 May  25.90 UT: m1=9.5 CCD, Dia.=3.06', DC=7/, Tail= 26' in PA: 320 deg., ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  25.88 UT: m1=7.9, Dia.=4.3', DC=5, ... 11-cm B (20x) ... Sergey Shurpakov (Baran', Belarus)
2017 May  25.03 UT: m1=7.8, Dia.=10', DC=4/, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  24.42 UT: m1=7.8:, Dia.=12’, DC=4, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, 8th magnitude background star in coma visible which interfered with observation. Slight hint of tail to the NW approximately. Low altitude = 18.4°. Easy to locate in a dark sky. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  24.41 UT: m1=8.3, Dia.=4.3’, DC=5/6, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Dust tail visible 10’ in length in P.A. 337° approximately. Low altitude = 16.6°. Transparent outer coma, opaque inner coma, small bright central condensation appears stellar sometimes. Inner coma does not enhance in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  24.01 UT: m1=7.1, Dia.=15', DC=4/, Tail= 0.5 deg. in PA: 320 deg., ... 12x45 monocular ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º 48' W) [The comet shows a much wider coma diameter, providing a brighter m1 estimate in comparison with my previous May 3.12 observation; there is also a lesser influence of the inner dust tail on the magnitude estimate. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith]
2017 May  23.89 UT: m1=7.8, Dia.=12', DC=4, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  23.89 UT: m1=8.2, Dia.=6', DC=4, Tail= 15', ... 15-cm T (30x) ... Carlos Labordena (Castellón, España)
2017 May  22.93 UT: m1=7.8, Dia.=12', DC=3/, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  22.92 UT: m1=8.1, Dia.=9', DC=4, ... 10-cm B(25x) ... Martin Lehky (Czech Republic)
2017 May  22.87 UT: m1=9.3, Dia.=5', DC=9, ... 30.5-cm L f/4.9 (47x) ... J. P. Navarro Pina & Manuel Hernandez (Puerto de la Cadena, Murcia, Spain) [comet very condensed and bright]
2017 May  21.89 UT: m1=8.3, Dia.=6.5', DC=5/, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 May  21.89 UT: m1=9.3 CCD, Dia.=2.19', DC=6, ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  21.87 UT: m1=7.9, Dia.=6.1', DC=5, ... 11-cm B (20x) ... Sergey Shurpakov (Baran', Belarus)
2017 May  21.50 UT: m1=8.3, Dia.=6.0', DC=5, Tail= 0.16 degrees in PA: 300 deg., ... 25x100 B ... David A. J. Seargent (Cowra, NSW, Australia) [Little change using Swan Banf filter, though possibly marginally fainter with filter]
2017 May  19.91 UT: m1=9.4 CCCD, Dia.=3.21', DC=7, Tail= 14' in PA: 309 deg., ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  19.90 UT: m1=7.8, Dia.=7', DC=5, ... 20x80 B ... Valentín Díaz (La Hoya, Alicante, España)
2017 May  19.90 UT: m1=8.0, Dia.=11', DC=3/, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  19.89 UT: m1=8.3, Dia.=9', DC=4, ... 10-cm B(25x) ... Martin Lehky (Czech Republic)
2017 May  19.89 UT: m1=7.8, Dia.=6.1', DC=5, ... 11-cm B (20x) ... Sergey Shurpakov (Baran', Belarus)
2017 May  19.88 UT: m1=8.4, Dia.=6.5', DC=4, Tail= 0.2 deg. in PA: 315 deg., ... 20x80 B ... Marek Biely (Brno, Czech Republic) [Observed through thin high clouds but with almost no interference]
2017 May  19.83 UT: m1=8.3, Dia.=7', DC=5, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 May  19.81 UT: m1=8.2, Dia.=6.8', DC=4, Tail= 2.5' in PA: 300 deg., ... 25-cm L (42x, 70x) ... Danil Sidorko (Korenovsk, Russia)
2017 May  19.09 UT: m1=8.2, Dia.=12´, DC=4/, ... 25-cm L F/4.5 (66x) ... Gonzalo Vargas (Cochabamba, Bolivia) [Se observó un alargamiento de la coma en un ángulo AP estimado en 292 grados]
2017 May  18.94 UT: m1=8.0, Dia.=10', DC=3, ... 5-cm B(10x) ... Martin Lehky (Czech Republic)
2017 May  18.93 UT: m1=8.3, Dia.=8', DC=3, ... 10-cm B(25x) ... Martin Lehky (Czech Republic)
2017 May  18.91 UT: m1=8.3, Dia.=7', DC=3/, Tail= 0.3 deg. in PA: 320 deg., ... 20x80 B ... Marek Biely (Brno, Czech Republic)
2017 May  19.89 UT: m1=8.0, Dia.=5', DC=4, no tail, ... 8cm B (11x) ... Carlos Labordena (Castellón, España)
2017 May  19.88 UT: m1=8.3, Dia.=6', DC=4, Tail= 13', ... 20-cm SCT (50x) ... Carlos Labordena (Castellón, España)
2017 May  18.88 UT: m1=8.1:, Dia.=5', DC=3, ... 20-cm L F/6 (37x) ... Marian Legutko (Gliwice, Poland) [light pollution, good transparency; no tail visible; Sidgwick method]
2017 May  18.84 UT: m1=8.4, Dia.=6.2', DC=3/, Tail= 3' in PA: 310 deg., ... 25-cm L (42x, 70x) ... Danil Sidorko (Korenovsk, Russia) 
2017 May  17.88 UT: m1=9.6 CCD, Dia.=3.5', DC=7/, ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  17.85 UT: m1=8.3, Dia.=6.5', DC=4/, ... 11-cm B (20x) ... Sergey Shurpakov (Baran', Belarus)
2017 May  17.83 UT: m1=8.3, Dia.=7', DC=6, ... 23.5-cm T (65x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 May  15.86 UT: m1=8.3, Dia.=4.5', DC=4/, ... 11-cm B(20x) ... Sergey Shurpakov (Baran’, Belarus)
2017 May  14.89 UT: m1=8.2, Dia.=4', DC=4/, ... 11-cm B(20x) ... Sergey Shurpakov (Baran’, Belarus)
2017 May  14.82 UT: m1=8.1, Dia.=5', DC=5, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 May  13.93 UT: m1=9.7 CCD, Dia.=3.06', DC=7/, Tail= 18' in PA: 311 deg., ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  13.87 UT: m1=8.9:, Dia.=3', DC=2, ... 20-cm L f/6 (49x) ... Marian Legutko (Gliwice, Poland) [bright sky, moderate transparency; no tail visible; Sidgwick method]
2017 May  12.87 UT: m1=9.7 CCD, Dia.=2.80', DC=7, ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  12.85 UT: m1=8.5, Dia.=4', DC=3/, ... 11-cm B(20x) ... Sergey Shurpakov (Baran’, Belarus)
2017 May  11.87 UT: m1=9.5 CCD, Dia.=2.63', DC=6/, Tail= 10' in PA: 299 deg., ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  09.91 UT: m1=10.1 CCD, Dia.=1.75', DC=6/, ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  06.72 UT: m1=8.4, Dia.=4.6’, DC=5/6, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Dust tail visible 15’ in length in P.A. 297° approximately. Low altitude = 7.6°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  06.20 UT: m1=8.9, Dia.=6', DC=4, Tail= 12', ... 20-cm SCT (50x) ... Carlos Labordena (Castellón, España)
2017 May  04.89 UT: m1=8.3, Dia.=4.6', DC=4, ... 11-cm B(20x) ... Sergey Shurpakov (Baran’, Belarus)
2017 May  04.85 UT: m1=9.5 CCD, Dia.=3.00', DC=6/, Tail= 9.5' in PA: 306 deg., ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  04.72 UT: m1=8.6, Dia.=7.5', DC=6, ... 40.0-cm L f/4.5 (36x) ... Seiichi Yoshida (Gunma, Japan)
2017 May  04.76 UT: m1=8.1, Dia.=6.5', DC=5, ... 10x70 R ... Seiichi Yoshida (Gunma, Japan)
2017 May  03.82 UT: m1=8.8, Dia.=5', DC=4, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 May  03.81 UT: m1=9.9 CCD, Dia.=2.62', DC=6/, ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  03.12 UT: m1=8.8, Dia.=7', DC=4/, Tail= 0.2 deg. in PA: 300 deg., ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54' N, 5º 48' W) [In 10x50 binoculars: m=7.7 for the coma + brighter inner dust tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.7 at zenith]
2017 May  02.89 UT: m1=8.0, Dia.=7', DC=4, ... 10-cm B(25x) ... Martin Lehky (Czech Republic)
2017 May  02.87 UT: m1=10.2 CCD, Dia.=2.48', DC=6/, ... 7-cm refractor f/4.5 + CCD ... Sergey Shurpakov (Baran’, Belarus)
2017 May  02.83 UT: m1=8.5, Dia.=4.7', DC=4, ... 11-cm B(20x) ... Sergey Shurpakov (Baran’, Belarus)
2017 May  01.91 UT: m1=9.4, Dia.=5', DC=3, ... 30.5-cm L (47x) ... J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain) [new method visual adapted Navarro-Beyer]
2017 May  01.91 UT: m1=9.7, Dia.=4', DC=3, ... 25.4-cm L (48x) ... A. M. Hernandez (Puerto de la Cadena, Murcia, Spain) [new method visual adapted Navarro-Beyer]
2017 May  01.90 UT: m1=9.3:, Dia.=2', DC=2, ... 20-cm L f/6 (68x)... Marian Legutko (Gliwice, Poland) [bright sky, poor transparency; no tail visible; Sidgwick method]
2017 Apr. 30.90 UT: m1=8.2, Dia.=7', DC=4, ... 25x100 B ... Martin Lehky (Czech Republic) [Morris Method]
2017 Apr. 30.25 UT: m1=8.8, Dia.=5', DC=4, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Apr. 29.85 UT: m1=8.4, Dia.=6.5', DC=4, ... 20x88 B ... Maik Meyer (Limburg, Germany)
2017 Apr. 28.83 UT: m1=8.4, Dia.=6', DC=3/, ... 13-cm L (52x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 28.72 UT: m1=8.8, Dia.=3.8’, DC=6, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible 17.3’ in length in P.A. 304° approximately; Inner coma fan shaped to the West, central condensation offset to the Eastern edge of the coma. Enhances in Swan Band filter. Low altitude = 10.1°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 28.12 UT: m1=9.2, Dia.=4', DC=5, Tail= 0.2 deg. in PA: 300 deg., ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º 48' W) [In 10x50 binoculars: m=7.7 for the coma + brighter inner dust tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.6 at zenith]
2017 Apr. 26.901 UT: m1=8.9, Dia.=6', DC=5, ... 20x80 B ... Neil Norman (FRAS, Ipswich, England) 
2017 Apr. 24.83 UT: m1=8.4, Dia.=7', DC=3, ... 20x100 B ... Martin Lehky (Czech Republic) [Morris Method]
2017 Apr. 22.91 UT: m1=9.2, Dia.=5', DC=3, ... 30.5-cm L (97x) ... J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain)
2017 Apr. 22.83 UT: m1=8.9, Dia.=5', DC=4, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 22.25 UT: m1=8.8, Dia.=4', DC=4, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Apr. 21.14 UT: m1=9.2, Dia.=4', DC=5, Tail= 0.2 deg. in PA: 300 deg., ... 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: 21.4 at zenith]
2017 Apr. 20.91 UT: m1=8.7, Dia.=4', DC=4, Tail=10', ... 10.2-cm R (20x) ... Carlos Labordena (Castellón, España)
2017 Apr. 19.92 UT: m1=10.9 CCD, Dia.=0.96',DC=6/, ... 0.25-m f/4.7 reflector + CCD ... Sergey Shurpakov (Observatory C36, Baran', Belarus)
2017 Apr. 19.87 UT: m1=8.3, Dia.=8', DC=3/, ... 20x88 B ... Maik Meyer (Limburg, Germany)
2017 Apr. 19.85 UT: m1=8.9, Dia.=4', DC=3/, ... 11-cm B(20x) ... Sergey Shurpakov (Observatory C36, Baran', Belarus)
2017 Apr. 19.85 UT: m1=9.1, Dia.=5', DC=4/, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia) [S - Sidgwick`s method]
2017 Apr. 18.88 UT: m1=8.7, Dia.=9', DC=3/, ... 20x88 B ... Maik Meyer (Limburg, Germany)
2017 Apr. 17.87 UT: m1=9.3 CCD, Dia.=0.92, DC=6/, ... 0.25-m f/4.7 reflector + CCD ... Serguey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 17.78 UT: m1=9.0, Dia.=3.5', DC=5, ... 13-cm L (65x) ... Alexsandr Morozov (Novozybkov, Russia) [S - Sidgwick`s method]
2017 Apr. 16.77 UT: m1=9.3, Dia.=3.2', DC=4, Tail= 2.5' in PA: 310 deg., ... 25-cm L (42x, 70x) ... Danil Sidorko (Korenovsk, Russia)
2017 Apr. 14.91 UT: m1=9.0, Dia.=4', DC=4, Tail=9', ... 10.2-cm R (20x) ... Carlos Labordena (Castellón, España)
2017 Apr. 13.89 UT: m1=9.4, Dia.=4.5', DC=3, ... 26x88 B ... Maik Meyer (Limburg, Germany)
2017 Apr. 07.16 UT: m1=9.2, Dia.=4', DC=4/, ... 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. Some moonlight interference. SQM: 21.0 at zenith]
2017 Apr. 05.73 UT: m1=9.6, Dia.=4’, DC=5/6, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances slightly in Swan Band filter, faint tail visible and traced to 9.6’ in P.A. 298° approximately. Low altitude= 11.4°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 05.10 UT: m1=9.3, Dia.=3.5', DC=4/, ... 15.2-cm R (38x) ... Maik Meyer (Limburg, Germany)
2017 Apr. 05.03 UT: m1=9.1, Dia.=4', ... 13-cm L (65x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 04.90 UT: m1=10.9 CCD, Dia.=1.55', DC=6/, ... 0.25-m f/4.7 reflector + CCD ... Serguey Shurpakov (Observatory C36, Baran', Belarus)
2017 Apr. 04.12 UT: m1=9.4, Dia.=4', DC=4, Tail= 0.2 deg. in PA: 310 deg., ... 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 : 21.7 at zenith]
2017 Apr. 03.72 UT: m1=9.7, Dia.=3.8’, DC=5, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter, faint dust tail visible 14’ in length in P.A. 318° approximately; Low altitude= 11.4°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 02.09 UT: m1=8.9, Dia.=6', DC=4, Tail= 0.15 deg. in PA: 290 deg., ... 20x80 B ... Marek Biely (Brno, Czech Republic, 244 m.a.s.l.)
2017 Apr. 01.948 UT: m1=9.3, Dia.=3', DC=4, ... 20x80 B ... Neil Norman (FRAS, Ipswich, England)
2017 Apr. 01.81 UT: m1=9.9, Dia.=4', DC=3, ... 20-cm f/4 L (45x) ... Andrew Pearce (Bailup, W. Australia) 
2017 Mar. 31.84 UT: m1=9.4, Dia.=2', DC=3/, Tail= 3' in PA: 305 deg., ... 25-cm L (42x, 70x) ... Danil Sidorko (Korenovsk, Russia) 
2017 Mar. 31.81 UT: m1=9.8, Dia.=3.5', DC=4/, ... 20-cm f/4 L (45x) ... Andrew Pearce (Bailup, W. Australia)
2017 Mar. 29.84 UT: m1=9.5, Dia.=2', DC=3/, Tail= 2.5' in PA: 300 deg., ... 25-cm L (42x & 70x) ... Danil Sidorko (Korenovsk, Russia) 
2017 Mar. 29.31 UT: m1=9.3, Dia.=4', DC=4, ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [enhanced image with Swan band filter]
2017 Mar. 29.10 UT: m1=9.4 CCD, Dia.=2.4', Tail (dust)= 0.13 deg in p.a. 315 deg., ... 15-cm L + CCD + Rc filter, f/4 ... Mieczyslaw Leszek Paradowski (Lublin, Poland)
2017 Mar. 29.08 UT: m1=9.1 CCD, Dia.=8.6', ... 15-cm L + CCD + V filter, f/4 ... Mieczyslaw Leszek Paradowski (Lublin, Poland)
2017 Mar. 28.89 UT: m1=9.1, Dia.=5.0', DC=4, ... 20x80 B ... Marek Biely (Brno, Czech Republic, 244 m.a.s.l.)
2017 Mar. 28.84 UT: m1=8.9, Dia.=8', DC=4, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 28.82 UT: m1=8.6, Dia.=11', DC=2/, ... 6-cm B (20x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 28.15 UT: m1=9.4, Dia.=6', DC=3/, Tail= 0.2 deg. in PA: 310 deg., ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Collado del Fresno, Asturias, Spain; Alt. 1280 m, 43º 10' N, 5º  54' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Dust tail 0.2-deg in p.a. 310 deg.]
2017 Mar. 28.15 UT: m1=9.8, Dia.=4', DC=4, Tail= 8', ... 20-cm SCT(50x) ... Carlos Labordena (Castellón, España)
2017 Mar. 27.86 UT: m1=9.5, Dia.=4.5', DC=3/, ... 20x80 B ... Marek Biely (Brno, Czech Republic, 244 m.a.s.l.)
2017 Mar. 27.70 UT: m1=9.7, Dia.=3.9’, DC=4, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, 16’ in length in P.A. 307° approximately; Coma dims slightly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Mar. 27.06 UT: m1=9.2, Dia.=2.5', DC=5, ... 60-cm L (78x) ... Sandor Szabo (Hungary) [Tail is 15' long to PA= 300-320 deg.]
2017 Mar. 26.93 UT: m1=9.2, Dia.=4.3', DC=4, ... 20x80 B ... Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Impression of seeing a hint of tail.]
2017 Mar. 25.92 UT: m1=9.6, Dia.=5', DC=4, ... 15.2-cm R f:5 (38x) ... Mail Mayer (Limburg, Germany)
2017 Mar. 24.94 UT: m1=8.5, Dia.=5', DC=4, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia) (Lm=6.2)
2017 Mar. 23.83 UT: m1=11.7 CCD, Dia.=1.5', DC=4, Tail= 6.5' in PA: 300 deg., ... 20-cm L +CCD ... Danil Sidorko (Korenovsk, Russia) 
2017 Mar. 23.82 UT: m1=9.8, Dia.=4', DC=4/, ... 25-cm (150x) ... Danil Sidorko (Korenovsk, Russia) 
2017 Mar. 22.57 UT: m1=9.5, Dia.=5.5', DC=5, ... 40.0-cm L f/4.5 (36x) ... Seiichi Yoshida (Ibaraki, Japan)
2017 Mar. 20.89 UT: m1=9.3, Dia.=3', DC=3, ... 13-cm L (52x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 20.04 UT: m1=9.7, Dia.=5', DC=3/, Tail= 0.2 deg. in PA: 320 deg., ... 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 : 21.7 at zenith. Dust 0.2-deg in PA 320 deg]
2017 Mar. 20.03 UT: m1=10.1, Dia.=3', DC=5, no tail, ... 20-cm SCT (50x) ... Carlos Labordena (Castellón, España)
2017 Mar. 18.98 UT: m1=10.4, Dia.=4', DC=3, ... 25-cm L (104x) ... Valentín Díaz (La Romaneta, Alicante, España)
2017 Mar. 16.95 UT: m2=11.4 CCD, Dia.=1.13', DC=6/, Tail= 9.5' in PA: 323 deg., ... 0.25-m f/4.7 reflector + CCD ... S. Shurpakov (Observatory C36, Baran', Belarus)
2017 Mar. 13.87 UT: m2=11.7 CCD, Dia.=0.89', DC=6/, ... 0.25-m f/4.7 reflector + CCD ... S. Shurpakov (Observatory C36, Baran', Belarus)
2017 Mar. 10.11 UT: m1=9.7, Dia.=4', DC=2/, ... 13-cm L (65x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 09.86 UT: m2=11.7 CCD, Dia.=0.88', DC=6/, Tail= 3.5' in PA: 321 deg., ... 0.25-m f/4.7 reflector + CCD ... S. Shurpakov (Observatory C36, Baran', Belarus)
2017 Mar. 06.98 UT: m1=10.0, Dia.=3.5', DC=3/, ... 25-cm (150x) ... Danil Sidorko (Korenovsk, Russia)
2017 Mar. 06.96 UT: m1=10.6 CCD, Dia.=2.3', DC=4, Tail= 3.5' in PA: 300 deg., ... 20-cm L + CCD ... Danil Sidorko (Korenovsk, Russia)
2017 Mar. 06.74 UT: m1=10.3, Dia.=2.6’, DC=6, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Inner coma enhances slightly in Swan Band filter, outer coma diffuse. Some interference by 11.6 mag star in coma, 1.4’ from the central condensation. Low altitude= 9.8°. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Mar. 05.96 UT: m1=12.0 CCD, Dia.=1', DC=4, Tail= 2.2' in PA: 288 deg. ... 20-cm L +CCD ... Danil Sidorko (Korenovsk, Russia) 
2017 Mar. 05.94 UT: m1=10.2, Dia.=2.8', DC=4, ... 25-cm (150x) ... Danil Sidorko (Korenovsk, Russia) 
2017 Mar. 04.99 UT: m1=11.8 CCD, Dia.=1.2', DC=4/, Tail= 2.3' in RA: 285 deg., ... 20-cm L ... Danil Sidorko (Korenovsk, Russia)
2017 Mar. 04.98 UT: m1=10.1, Dia.=3.25', DC=4/, ... 25-cm L (150x) ... Danil Sidorko (Korenovsk, Russia) 
2017 Mar. 04.05 UT: m1=11.7 CCD, Dia.=1.0', DC=6/, Tail= 6' in PA: 281 deg., ... 0.25-m f/4.7 L + CCD ... Sergey Shurpakov (Observatory C36, Baran', Belarus)
2017 Mar. 02.02 UT: m1=10.5, m2=14.5, Dia.=2', DC=s6, Tail= 3,5' PA: 325 deg., ... 25.4-cm L (109x) ... Gabor Santa (Göd, county Pest, Hungary) [nelm:6, 51 deg above horizon, SQM=19.5]
2017 Feb. 27.05 UT: m1=10.2, Dia.=2.5', DC=5, ... 8-cm R (17x) ... Piotr Guzik (Koskowa Góra, Poland; Alt. 810 m, 49º 45' N, 19º 47' E) [Morris method used. SQM-L: 21.3 at zenith]
2017 Feb. 25.91 UT: m2=12.4 CCD, Dia.=0.59', DC=6/, Tail= 5.3' in PA: 326 deg., ... 0.25-m f/4.7 reflector + CCD ... S. Shurpakov (Observatory C36, Baran', Belarus)
2017 Feb. 25.00 UT: m2=12.4 CCD, Dia.=0.59', DC=8, ... 0.25-m f/4.7 reflector + CCD ... S. Shurpakov (Observatory C36, Baran', Belarus)
2017 Feb. 24.99 UT: m1=9.9, Dia.=4', DC=3, ... 25x100 B ... Juan Jose Gonzalez (La Vega de Robledo de Caldas, Leon, Spain; Alt. 1110 m, 42º 55' N, 5º 53' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Mountain location, very clear sky]
2017 Feb. 24.99 UT: m1=10.3, Dia.=2', DC=6, Tail= 0.15 deg. in PA:~300 deg., ... 33-cm L (67x) ... Piotr Guzik (Teodorów, Poland, Alt. 287 m, 50º 27' N, 20º 18' E) [Morris method used. Broad dust tail realtively easy to see. Coma "grows" to ~4' when viewed through SWAN band filter. Also visible in 10x50 binoculars at m1=9.7, Dia.=4', DC=5. Excellent transparency. SQM: 21.3 at zenith.]
2017 Feb. 24.94 UT: m1=[10.3, NEGATIVE, Dia.=2.0', ... 20x80 B ... Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Sometimes I had the impression that something really faint is visible in the predicted position, but I was not sure about it. Fainter than 10.3 mag.]
2017 Feb. 23.73 UT: m1=10.8, Dia.=3.3’, DC=4, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Slight Moonlight interference; Low altitude = 7.5°; Enhances slightly in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Feb. 21.99 UT: m1=11.0, m2=13.9, Dia.=1.5', DC=s6, Tail= 4' PA: 310 deg., ... 25.4-cm L (133x) ... Gabor Santa (Göd, county Pest, Hungary) [nelm:6, 41 deg above horizon]
2017 Feb. 19.02 UT: m1=10.6, Dia.=1.5', DC=4, ... 25.4-cm L f:5 (64x) ... Maik Meyer (Limburg, Germany)
2017 Feb. 18.03 UT: m1=10.7, Dia=2', DC=4, no tail, ... 20-cm SCT (80x) ... Carlos Labordena (Castellón, España)
2017 Feb. 15.89 UT: m1=[10.1, NEGATIVE, Dia.=1.5', ... 20x80 B ... Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Fainter than 10.1 mag.]
2017 Feb. 15.86 UT: m1=10.6, Dia.=1.5', DC=5, ... 33-cm L (67x) ... Piotr Guzik (Koskowa Góra, Poland, Alt. 800 m, 49º 45' N, 19º 47' E) [Morris method used. SQM: 21.1 at zenith]
2017 Feb. 14.91 UT: m1=11.8 CCD, Dia.=1.26', DC=6/, Tail= 7.5' in PA: 275 deg ... 0.25m f/4.7 reflector + CCD ... Sergey Shurpakov (C36, Baran', Belarus)
2017 Feb. 06.79 UT: m1=11.6, Dia.=2.5', DC=6/, Tail= 4.5' in PA: 310 deg ... 40.0-cm L f/4.5 (75x) ... Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 29.93 UT: m1=11.6, Dia.=2.3′, DC=5, ... 35-cm L (62x) ... Jakub Cerny (Senohraby, Czech Republic)
2017 Jan. 28.15 UT: m1=11.4, Dia.=1.5′, DC=5, Tail= 0.07 deg in PA: 315 deg ... 33-cm L (67x)... Piotr Guzik (Koskowa Góra, Poland... Alt. 800 m, 49º 45′ N, 19º 47′ E) [Morris method. APASS comparison stars. SQM: 20.9 at zenith.]
2017 Jan. 27.99 UT: m1=10.4, Dia.=2.7', DC=3/, ... 20x100 B ... Martin Lehky (Czech Republic)
2017 Jan. 27.99 UT: m1=10.9, Dia.=1.3′, DC=6, Tail= 0.08 deg. PA: 280 deg ... 32.0-cm L (96x)... Uwe Pilz (Leipzig, Germany)
2017 Jan. 26.99 UT: m1=10.4, Dia.=2.8', DC=3/, ... 20x100 B ... Martin Lehky (Czech Republic)
2017 Jan. 25.97 UT: m2=12.4 CCD, Dia.=0.74′, DC=6/, Tail=9′ in PA 322 deg ... 0.25-m f/4.7 reflector + CCD... Sergei Shurpakov (C36, Baran’, Belarus)
2017 Jan. 24.79 UT: m1=11.9, Dia.=1.7′, DC=6/, ... 40.0-cm L f/4.5 (75x)... Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 24.20 UT: m1=10.6, Dia.=3′, DC=3/, ... 20-cm SCT (77x)... Juan Jose Gonzalez (Collada de la Cobertoria, Asturias, Spain... Alt. 1190 m, 43º 09′ N, 5º 54′ W ) [ Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Mountain location, very clear sky]
2017 Jan. 19.01 UT: m1=12.4, Dia.=0.70′, DC=6/, Tail=5.4′ in PA 320 deg ... 0.25-m f/4.7 reflector + CCD... Sergei Shurpakov (C36, Baran’, Belarus)
2017 Jan. 07.20 UT: m1=10.7, 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: 21.5 at zenith. Mountain location, very clear sky]
2017 Jan. 07.07 UT: m2=12.3 CCD, Dia.=0.88′, DC=6/, Tail=5′ in PA: 314 deg ... 0.25-m f/4.7 reflector + CCD... S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Jan. 07.00 UT: m2=13.3 CCD, Dia.=0.6′, DC=2, Tail= 1′ in PA: 340 deg ... 20-cm L+CCD... Danil Sidorko (Korenovsk, Russia)
2017 Jan. 06.19 UT: m1=11.3, dia.=1.3′, DC=4, ... 25.4-cm L f/5 (64x)... Maik Meyer (Limburg, Germany)
2017 Jan. 05.252 UT: m1=10.1, Dia.=1.5′, DC=2, ... 20×80 B... Neil Norman (Ipswich, England)
2017 Jan. 01.22 UT: m1=10.8, Dia.=3′, DC=3/, ... 20-cm SCT (77x)... Juan Jose Gonzalez (Puerto de las Señales, Leon, Spain... Alt. 1610 m, 43º 05′ N, 5º 14′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.7 at zenith. Mountain location, very clear sky]
2016 Dec. 30.20 UT: m1=11.5, Dia.=2.0′, DC=s7/, Tail= 0.08 deg. in PA: 225 deg.... 32-cm L f/5 (96x)... Uwe Pilz (Leipzig, Germany)
2016 Dec. 30.14 UT: m1=11.8, Dia.=1.2’, DC=5, ... 60-cm L (77x)... Sandor Szabo (Hungary) [Tail= 5’ to PA: 320 deg.]
2016 Dec. 29.22 UT: m1=11.8, Dia.=1.5′, DC=4, ... 25.4-cm L f/5 (64x)... Maik Meyer (Limburg, Germany)
2016 Dec. 29.19 UT: m1=11.9, Dia.=1.0′, DC=7/, Tail= 0.08 deg. in PA: 330 deg ... 35-cm L (62x)... Jakub Cerny (Senohraby, Czech Republic)
2016 Dec. 26.17 UT: m1=10.8, Dia.=3′, DC=3/, ... 20-cm SCT (77x)... Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España... Alt. 1350 m, 43º 10′ N, 5º 54′ W) [Método Sidgwick. Estrellas de comparación Tycho-2. SQM zenital: 21.4. Condensación central cuasi-estelar : m2=13.0:(APASS). Cielo muy claro de montaña]
2016 Dec. 23.09 UT: m1=10.9, Dia=3′, DC=3, no tail... 20-cm SCT (80x)... Carlos Labordena (Castellón, España)
2016 Dec. 11.09 UT: m2=12.8 CCD, Dia.=0.74′, DC=7/, Tail= 4′ in PA: 314 deg ... 0.25-m L f/4.7... Sergey Shurpakov (C36, Baran’, Belarus)
2016 Dec. 10.23 UT: m1=10.8, Dia.=3′, DC=3, ... 20-cm SCT (77x)... Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [Cielo muy claro de montaña]
2016 Dec. 06.22 UT: m1=10.6, Dia.=3′, DC=3/, ... 20-cm SCT (77x)... Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [Condensación central cuasi-estelar : m2=12.9:(APASS). Cielo muy claro de montaña]
2016 Dec. 05.25 UT: m1=10.6, Dia.=4′, DC=3, ... 20-cm SCT (77x)... Juan José González (Pico del Pozo de la Nieve – Sierra de la Bobia, alt. 1130 m, Asturias, España)
2016 Dec. 05.18 TU: m1=12.0, Dia.=1.5, DC=3/, ... 25.4-cm L f:5 (104x)... Maik Meyer (Limburg, Germany)
2016 Dec. 03.11 UT: m1=10.8, Dia=4′, DC=2, no tail... 20-cm SCT (80x)... Carlos Labordena (Castellón, España)
2016 Dec. 02.79 UT: m1=12.8, Dia.=1.5′, DC=7, ... 40.0-cm L f/4.5 (144x)... Seiichi Yoshida (Gunma, Japan)
2016 Nov. 30.16 UT: m1=10.4, Dia.=5′, DC=2/, ... 20-cm SCT (77x)... Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [Cielo muy claro de montaña]
2016 Nov. 29.19 TU: m1=12.2, Dia.=1.0′, DC=4, ... 25.4-cm L f:5 (104x)... Maik Meyer (Limburg, Germany)
2016 Nov. 29.13 UT: m1=12.8, Dia.=0.7′, DC=5, ... 60-cm L (184x)... Sandor Szabo (Hungary) [With 306x: droplike compact coma, bright false-nucleus and 2’ long tail to PA: 325 deg.]
2016 Nov. 28.20 TU: m1=12.2, Dia.=1.2′, DC=5, ... 25.4-cm L f:5 (104x)... Maik Meyer (Limburg, Germany)
2016 Nov. 25.21 UT: m1=10.5, Dia.=5′, DC=2/, ... 20-cm SCT (77x)... Juan José González (Sierra de Tineo, alt. 1040 m, Asturias, España) [Cielo muy claro de montaña]
2016 Nov. 25.12 UT: m1=11.1, Dia=3′, DC=2, no tail... 20-cm SCT (80x)... Carlos Labordena (Castellón, España)
2016 Nov. 05.78 UT: m1=13.0, Dia.=1.1′, DC=4, ... 40.0-cm L f/4.5 (257x)... Seiichi Yoshida (Gunma, Japan)
2016 Nov. 04.81 UT: m1=13.3, Dia.=1.5′, DC=5, ... 40.0-cm L f/4.5 (144x)... Seiichi Yoshida (Gunma, Japan)
2016 Nov. 02.22 UT: m1=10.6, Dia.=4′, DC=2, ... 20-cm SCT (77x)... Juan José González (Mallo de Luna, alt. 1120 m, León, España) [Cielo muy claro de montaña]
2016 Oct. 30.17 UT: m1=11.2, Dia.=3′, DC=2, no tail... 20-cm SCT (80x)... Carlos Labordena (Castellón, España)
2016 Oct. 27.16 UT: m1=10.6, Dia.=4′, DC=2/, ... 20-cm SCT (100x)... Juan José González (Pandorado, alt. 1190 m, León, España) [Débil coma externa. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]
2016 Oct. 20.81 UT: m1=13.1, Dia.=0.6′, DC=5, ... 40.0-cm L f/4.5 (257x)... Seiichi Yoshida (Gunma, Japan)
2016 Oct. 03.17 UT: m1=10.8, Dia.=3.5′, DC=3, ... 20-cm SCT (100x)... Juan José González (Alto del Castro, alt. 1720 m, León, España) [Esta observación, realizada con menor aumento, proporciona un mayor diámetro de la débil coma exterior, y con ello una m1 más brillante, en comparación con la previa realizada en Sep. 29.18. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]
2016 Sep. 29.18 UT: m1=11.7, Dia.=2.0′, DC=3/, ... 20-cm SCT (133x)... Juan José González (Alto del Castro, alt. 1720 m, León, España) [Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]
2016 Sep. 09.17 UT: m1=12.2, Dia.=2.0′, DC=4, ... 20-cm SCT (133x)... Juan José González (Alto del Trichero, alt. 1190 m, León, España) [Observación realizada en mejores condiciones que en la previa de Sep. 6.18 UT, desde una localización de montaña más elevada y cielo más oscuro, midiendo un mayor diámetro de coma y con ello una m1 más brillante. Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]
2016 Sep. 06.18 UT: m1=13.4, Dia.=0.5′, DC=7, ... 20-cm SCT (133x)... Juan José González (Nogarejas, alt. 920 m, León, España) [Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Cielo claro de montaña]
2016 Sep. 01.82 UT: m1=13.0, Dia.=1′, DC=5, ... 30-cm L f/5 (167x)... Mieczyslaw Leszek Paradowski (Dąbrowa, Poland) [NELM=6.0... alt. 16 deg]
2016 Sep. 01.11 UT: m1=14.3, Dia.=0.4′, DC=6, ... 60-cm L (244x)... Sandor Szabo (Hungary)
2016 Aug. 30.82 UT: m1=14.1, Dia.=0.8′, DC=4/, ... 35-cm L (178x)... Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 30.06 UT: m1=13.9, Dia.=0.6′, DC=5, ... 40-cm L (200x)... Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 27.83 UT: m1=12.9, Dia.=0.8′, DC=4, ... 30-cm L f/5 (167x)... Mieczyslaw Leszek Paradowski (Dąbrowa, Poland) [NELM=6.0... alt. 16 deg]
2016 Aug. 27.83 UT: m1=14.1, Dia.=0.5′, DC=5/, ... 35-cm L (178x)... Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 26.84 UT: m1=12.9, Dia.=0.71′, DC=4, ... 30-cm L f/5 (167x)... Mieczyslaw Leszek Paradowski (Dąbrowa, Poland) [NELM=6.0... alt. 16 deg]
2016 Apr. 16.84 UT: m1=15.5 CCD, Dia.=0.42′, DC=8, ... 15-cm L ... Sergey Shurpakov (Baran’, Belarus)
2016 Apr. 11.79 UT: m1=15.4 CCD, Dia.=0.34′, DC=8, ... 15-cm L ... Sergey Shurpakov (Baran’, Belarus)
2016 Mar. 30.87 UT: m1=15.7, Dia.=0.25′, DC=6, ... 60.3-cm L (307x)... Sandor Szabo (Sopron, Hungary)
2015 Nov. 12.10 UT: m1=15.8, Dia.=0.25′, DC=3, ... 60.3-cm L (244x)... Sandor Szabo (Sopron, Hungary)
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