C/2016 R2 (PANSTARRS)

C/2016 R2 (PANSTARRS)
Reported observations:
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. 10.77 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. 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)
2017 Dec. 27.86 UT: m1=10.8 DSLR, Dia.=4', ... 3.4-cm A + DSLR V, f/4 (1200s) ... Mieczyslaw Leszek Paradowski (Lublin, Poland) [Cat. UCAC4 (7 solar type comp. stars); m1 measured using Infinite Aparture Method - Error +/-0.1 mag; Moonlight (66% of full); comet alt.+51deg.]
2017 Dec. 23.59 UT: m1=11.2, Dia.=3.5’, DC=3/4, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Interference by faint stars in coma; Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Dec. 19.45 UT: m1=11.0, Dia.=2.6', DC=3, ... 40.0-cm L f/4.5 (75x) ... Seiichi Yoshida (Ibaraki, Japan)
2017 Dec. 18.72 UT: m1=11.5, Dia.=2.3', DC=3, ... 40.0-cm L f/4.5 (75x) ... Seiichi Yoshida (Ibaraki, Japan)
2017 Dec. 16.14 UT: m1=10.1, Dia.=5', DC=2, ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Villacintor, Leon, Spain; Alt. 930 m, 42º 29' N, 5º 11' W) [Increasing activity. It is difficult to separate the contribution of the inner ion tail from that of the coma to the total magnitude m1. Field stars checked in DSS. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2017 Dec. 15.08 UT: m1=12.3, Dia.=1', DC=4, ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Dec. 14.66 UT: m1=10.8, Dia.=3.8’, DC=3/4, ... 25cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Tail visible 5’ in length in P.A. 100° approximately. coma does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Dec. 13.89 UT: m1=12.1 CCD, Dia.=1.18', DC=6/, ... 0.25-m f/4.7 reflector + CCD ... Sergey Shurpakov (Observatory C36, Baran', Belarus)
2017 Dec. 13.60 UT: m1=11.0, Dia.=3.2’, DC=4, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Tail visible 5.6’ in length in P.A. 358° approximately, semi-transparent; Interference by star pair in coma. Coma dims in Swan band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Dec. 11.39 UT: m1=11.4, Dia.=1.8', DC=3, ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2017 Dec. 07.45 UT: m1=11.2, Dia.=2’, DC=3, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Coma appears elongated to the West approximately. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Dec. 06.80 UT: m1=11.7, Dia.=1.5', DC=3, ... 30.5-cm L (250x) ... J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain)
2017 Nov. 26.17 UT: m1=11.1, Dia.=2.5', DC=3, ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º 48' W) [Field stars checked in DSS. Sidgwick method. APASS comparison stars. SQM: 21.2]
2017 Nov. 24.75 UT: m1=12.6, Dia.=1.4', DC=4, ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2017 Nov. 24.67 UT: m1=12.3, Dia.=2.4’, DC=3, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma pale blue in colour and diffuse with an opaque centre, appears elongated to the NW approximately. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Nov. 22.92 UT: m1=11.9, Dia.=1.2', DC=5, ... 60-cm L (244x) ... Sandor Szabo (Hungary)
2017 Nov. 16.18 UT: m1=11.7, Dia.=1.3', DC=3/, ... 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: 20.9]
2017 Nov. 14.89 UT: m1=13.4, Dia.=0.4', DC=5, ... 60-cm L (244x) ... Sandor Szabo (Hungary)
2017 Nov. 14.19 UT: m1=11.8, Dia.=1.3', DC=3, ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54' N, 5º 48' W) [Field stars checked in DSS. Sidgwick method. APASS comparison stars. SQM: 21.0]
2017 Nov. 14.14 UT: m1=12.8, Dia.=1', DC=3, ... 22-cm L (160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Nov. 09.49 UT: m1=12.9, Dia.=1’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult due to glare from bright star at edge of field. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 30.69 UT: m1=12.8, Dia.=2’, DC=2/3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, interference from mag 12.8 star in coma; Slight brightening to centre, does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 27.99 UT: m1=13.5, Dia.=0.7', DC=1-2, ... 0.40-m Dobsonian f/4.4 (200x) ... Gabor Santa (Göd, Hungary) [Diffuse. Close (6') to Berkeley 20 open clulster which was brighter and bigger]
2017 Oct. 26.68 UT: m1=13.2, Dia.=0.7', DC=3/, ... 40.0-cm L f/4.5 (257x) ... Seiichi Yoshida (Gunma, Japan)
2017 Oct. 03.20 UT: m1=13.2, Dia.=1.1', DC=3, ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º 48' W) [Field stars checked in DSS. Sidgwick method. APASS comparison stars. SQM: 21.0]
2017 Sep. 27.61 UT: m1=13.9, Dia.=0.6’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, small. Visible in periods of good seeing. Slight haze from dust and bushfire smoke. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 25.73 UT: m1=14.0, Dia.=0.6', DC=3, ... 40.0-cm L f/4.5 (257x) ... Seiichi Yoshida (Gunma, Japan)
2017 Sep. 21.75 UT: m1=13.8, Dia.=0.9’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, slight brightening to centre. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
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