C/2016 R2 (PANSTARRS)

C/2016 R2 (PANSTARRS)
Reported observations:
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 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 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 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)
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. 23.91 UT: m1=11.7, Dia.=1.5', DC=3, no tail, ... 20-cm SCT(117x) ... Carlos Labordena (Castellón, España)
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. 20.13 UT: m1=10.2, Dia.=5', DC=2/, ... 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. It is difficult to separate the contribution of the inner ion tail from that of the coma to the total magnitude m1]
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. 16.87 UT: m1=12.1, Dia.=1.5', DC=2, no tail, ... 20-cm SCT(117x) ... Carlos Labordena (Castellón, España)
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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