62P/Tsuchinshan 1

62P/Tsuchinshan 1
Reported observations:
2018 Jan. 17.68 UT: m1=12.5, Dia.=3.3’, DC=2, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, enhances slightly in Swan Band filter at x39. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2018 Jan. 13.67 UT: m1=11.8, Dia.=2’, DC=2, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia]) [Coma very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Dec. 23.67 UT: m1=11.7, Dia.=2.9’, DC=3, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 16°. No enhancement in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Dec. 18.78 UT: m1=11.3, Dia.=2.7', DC=2, ... 40.0-cm L f/4.5 (75x) ... Seiichi Yoshida (Ibaraki, Japan)
2017 Dec. 16.19 UT: m1=9.7, Dia.=6', DC=2/, ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Villacintor, Leon, Spain; Alt. 930 m, 42º 29' N, 5º 11' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2017 Dec. 15.30 UT: m1=10.4, Dia.=4', DC=3, ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Dec. 14.68 UT: m1=11.0, Dia.=4.3’, DC=3, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 16.5°. Coma does not enhance in Swan Band filter, diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Nov. 26.20 UT: m1=9.8, Dia.=6', 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: 21.2]
2017 Nov. 24.78 UT: m1=10.4, Dia.=4', DC=1/, ... 40.0-cm L f/4.5 (75x) ... Seiichi Yoshida (Gunma, Japan)
2017 Nov. 24.70 UT: m1=10.9, Dia.=3.2´, DC=3, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances slightly in Swan Band filter. Low altitude = 15.1°; Slightly foggy. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Nov. 16.16 UT: m1=9.2, Dia.=7', DC=2/, ... 25x100 B... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º 48' W) [Altitude: 30 deg. In 20 cm SCT (77x) : m1=9.6, Dia.=6', DC=2. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2017 Nov. 14.12 UT: m1=9.6, Dia.=6', DC=2/, ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54' N, 5º 48' W) [Altitude: 21 deg. Before moonrise. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2017 Nov. 02.16 UT: m1=10.8, Dia.=2.5', DC=2/, ... 25.4-cm L f:5 (64x) ... Maik Meyer (Limburg, Germany)
2017 Nov. 01.13 UT: m1=10.5, d=2.8', DC=2, ... 0.15-m R f/5 (85x) ... Gabor Santa (Göd, Hungary) [comet is easy to see, diffuse, round, with some condensation. 40 deg above horizon, nelm=5.5]
2017 Nov. 01.02 UT: m1=11.0, Dia.=2.2', DC=3/, ... 25-cm L (150x) ... Danil Sidorko (Korenovsk, Russia) [SQM = 20.42]
2017 Oct. 30.72 UT: m1=11.0, Dia.=3.2’, DC=3, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 16.6°; Weakly condensed coma. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 30.18 UT; m1=10.9, Dia.=3', DC=2/, ... 25.4-cm L f:5 (64x); ... Maik Meyer (Limburg, Germany)
2017 Oct. 26.77 UT: m1=11.5, Dia.=2.4', DC=3, ... 40.0-cm L f/4.5 (75x) ... Seiichi Yoshida (Gunma, Japan)
2017 Oct. 23.22 UT: m1=10.2, Dia.=5', DC=2, ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto del Castro - Aralla, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W) [Significantly brighter than expected. Altitude: 46 deg. Zodiacal light. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2005 July 02.94 UT: m1=13.6, Dia.=1', DC=1 ... 45-cm L (100x) ... J. Carvajal (Avila, Spain)
2005 Apr. 05.99 UT: m1=[13.6, Dia.=1' ... 36-cm L (90x) ... A. Baransky (Pylypovychi, Ukraine)
2005 Apr. 05.92 UT: m1=14.6 CCD, Dia.=1.2' ... 0.25-m SCT/ccd ... A. Lepardo and V. Santini (Remanzacco, Italy) [Round coma with a weak central condensation. Cousins R filter used]
2005 Apr. 05.53 UT: m1=13.8, Dia.=1.8', DC=2 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Ibaraki, Japan) [I believed it became too faint to see visually. But actually, it is visible still now, although very faint and diffused.]
2005 Apr. 01.90 UT: m1=14.7 CCD, Dia.=1.2' ... 0.25-m SC/ccd ...  G. Sostero (Remanzacco, Italy) [Very faint and moderately diffuse object. Cousins R filter used]
2005 Mar. 08.56 UT: m1=13.3, Dia.=0.8', DC=1 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Ibaraki, Japan) [Still visible, but extremely diffused and hard to see.]
2005 Mar. 02.90 UT: m1=12.9, Dia.=0.9', DC=2 ... 36-cm L (90x) ... A. Baransky (Pylypovychi, Ukraine)
2005 Feb. 10.95 UT: m1=12.6, Dia.=1.7', DC=2 ... 36-cm L (80x) ... A. Baransky (Pylypovychi, Ukraine)
2005 Feb. 06.85 UT: m1=12.7, Dia.=1.3', DC=3 ... 32-cm L (87x) ... Yoshimi Nagai (Nagano, Japan)
2005 Feb. 05.92 UT: m1=12.0, Dia.=3.0', DC=1 ... 30-cm L (60x) ... Vitali Nevski (Vitebsk, Belarus)
2005 Feb. 05.80 UT: m1=13.1, Dia.=1.2', DC=0/ ... 40.0-cm L f/4.5 (75x) ... Seiichi Yoshida (Ibaraki, Japan) [Extremely diffused as before. The surface brightness became fainter, so now it is difficult to see. In the same field with a galaxy NGC 4710 (11.0 mag), much brighter than 62P.]
2005 Feb. 05.97 UT: m1=12.4, Dia.=1.8', DC=2/ ... 36-cm L (80x) ... A. Baransky (Pylypovychi, Ukraine) [Excellent view, round comet near the extended galaxy NGC 4710.]
2005 Feb. 05.11 UT: m1=12.7:, Dia.=2', DC=2 ... 30-cm SCT (116x) ... Martin Adamovsky, (Rokycany, Czech Republic) [limit of visibility, very faint object]
2005 Jan. 18.04 UT: m1=12.7, Dia.=1', DC=2 ... 30-cm L (60x) ... Vitali Nevski (Vitebsk, Belarus)
2005 Jan. 17.08 UT: m1=12.5, Dia.=1.7', DC=2 ... 36-cm L (80x) ... A. Baransky (Pylypovychi, Ukraine)
2005 Jan. 08.78 UT: m1=11.0, Dia.=5.0', DC=2 ... 40.0-cm L f/4.5 (75x) ... Seiichi Yoshida (Ibaraki, Japan) [Very large! Very diffused but easy to see.]
2004 Dec. 18.75 UT: m1=12.3, Dia.=1.4', DC=1 ... 20-cm L (100x) ... Andrew Pearce (Noble Falls, Western Australia)[Diffuse object.]
2004 Dec. 14.10 UT: m1=11.9, Dia.=2.6', DC=1/ ... 20-cm L (38x) ... Tilen Cadez (Kisovec, alt. 1250m, Slovenia)
2004 Dec. 11.77 UT: m1=12.3, Dia.=1.2', DC=1 ... 20-cm L (100x) ... Andrew Pearce (Noble Falls, Western Australia) [Diffuse object]
2004 Dec. 11.77 UT: m1=11.8, Dia.=2.4', DC=2 ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan) [Very wide and diffused. Much brighter than November, and easy to see with a large telescope.]
2004 Dec. 09.16 UT: m1=12.2, Dia.=2', DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Aralla, alt.1440 m, Leon, North Spain)
2004 Dec. 09.10 UT: m1=11.5, Dia.=1.8', DC=1 ... 20-cm L (38x) ... Tilen Cadez (Kisovec, alt. 1250m, Slovenia) [Transparent sky, good seeing, windy. Comet was very difused, but easily seen. Galaxies NGC 3593 and NGC 3489 were both brighter than comet.]
2004 Dec. 06.00 UT: m1=12.0, Dia.=1.5', DC=2 ... 20.3-cm L (63x) ... Piotr Guzik (Krosno, Poland) [Clearly visible despite rising moon several degrees below the comet. M95, M96, M105 and NGC 3371 were all well visible.]
2004 Nov. 20.82 UT: m1=12.6, Dia.=1.5', DC=1 ... 20-cm L (100x) ... Andrew Pearce (Noble Falls, Western Australia) [Difficult and diffuse object.]
2004 Nov. 19.81 UT: m1=12.4, Dia.=1', DC=2 ... 20-cm L (100x) ... Andrew Pearce (Noble Falls, Western Australia) [Faint object but relatively easily seen at mid to high power, close to 13th mag star.]
2004 Nov. 16.16 UT: m1=12.8, Dia.=1.7', DC=2 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Camposagrado, alt.1135 m, Leon, North Spain)
2004 Nov. 09.77 UT: m1=13.8, Dia.=2.0', DC=1/ ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan) [Extremely diffused]
1998 May  15.85 UT: m1=12.9, Dia.=0.6', DC=3 ... 44-cm L (156x)... Werner Hasubick (Buchloe, Germany)
1998 Mar. 25.08 UT: m1=13.5 CCD, Dia.=1', DC=1 ... 45-cm CASS/ST6... Tom Johnston (Sommers-Bausch Observatory, CU) [Has brightened greatly]
1998 Mar. 15.10 UT: m1=15.4 CCD, Dia.=1', DC=1 ... 45-cm CASS/ST6... Tom Johnston (Sommers-Bausch Observatory,CU) [No tail seen in movie]
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