* * * * * 62P/Tsuchinshan 1 * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2018 2 25.160 S 13.7 AQ 30.5T 139 1 3/ DIJ Burlage 2018 2 25.157 S 13.5 AQ 30.5T 139 1.5 2 BOU Burlage, Germany (Comet close to star of magn. 11.5.) 2018 2 10.64 S 12.4 AQ 25.0L 83 2 2 WYA Walcha, NSW (Coma very diffuse, slight moonlight interference.) 2018 1 20.69 S 12.5 AQ 25.0L 39 3.1 3 WYA Walcha, NSW (Enhances slightly in Swan Band filter. Circular coma with an opaque but weak centre.) 2018 1 18.18 S 10.7 TK 20.3T 77 5 1/ GON Puerto de Aralla, León 2018 1 17.68 S 12.5 AQ 25.0L 83 3.3 2 WYA Walcha, NSW (Coma diffuse. Enhances slightly in Swan Band filter at 39x.) 2018 1 13.67 S 11.8 AQ 25.0L 83 2 2 WYA Walcha, NSW (Coma very diffuse, slight brightening to centre.) 2017 12 23.67 S 11.7 AQ 25.0L 39 2.9 3 WYA Walcha, NSW (Low altitude 16°. No enhancement in Swan Band filter.) 2017 12 20.16 S 9.7 TK 20.3T 77 6 2 GON Puerto de Aralla, León 2017 12 18.78 S 11.3 TJ 40.0L 75 2.7 2 YOS Mt. Hanadate, Ibaraki (Bright. Looks diffuse as before.) 2017 12 16.19 S 9.7 TK 20.3T 77 6 2/ GON Villacintor, León 2017 12 15.30 S 10.4 TK 22.0L 60 4 3 GOI Araçatuba 2017 12 14.68 S 11.0 AQ 25.0L 39 4.3 3 WYA Walcha, NSW (Low altitude 16.5°. Coma does not enhance in Swan Band filter, diffuse.) 2017 11 26.20 S 9.8 TK 20.3T 77 6 2/ GON Puerto de Aralla, León 2017 11 25.192 S 10.6 AQ 25.4J 47 3.5 2/ BOU Sint Annen 2017 11 24.78 S 10.4 TJ 40.0L 75 4 1/ YOS Kita-karuizawa, Gunma (Bright and large. Diffuse.) 2017 11 24.70 S 10.9 AQ 25.0L 39 3.2 3 WYA Walcha, NSW (Coma enhances slightly in Swan Band filter. Low altitude 15.1°. Slightly foggy.) 2017 11 16.16 S 9.2 TK 10.0B 25 7 2/ GON Puerto de Aralla, León (Altitude 30°.) 2017 11 16.15 S 9.6 TK 20.3T 77 6 2 GON Puerto de Aralla, León 2017 11 14.12 S 9.6 TK 20.3T 77 6 2/ GON Puerto de Aralla, León (Altitude 21°. Before moonrise.) 2017 10 30.72 S 11.0 AQ 25.0L 39 3.2 3 WYA Walcha, NSW (Low altitude 16.6°. Weakly condensed coma. Does not enhance in Swan Band filter.) 2017 10 26.77 S 11.5 TA 40.0L 75 2.4 3 YOS Kita-karuizawa, Gunma (I was surprised that it became very bright and large. Easy to see.) 2017 10 23.22 S 10.2 TK 20.3T 100 5 2 GON Alto del Castro - Aralla, León (Significantly brighter than expected. Altitude 46°. Zodiacal light.)
2005 5 3.51 S[13.8 AU 40.0L 144 !0.8 YOS Gunma, Japan (Not visible at all.) 2005 4 5.53 S 13.8 AU 40.0L 144 1.8 2 YOS Ibaraki, Japan (I believed it became too faint to see visually. But actually, it is still visible, although very faint and diffuse.) 2005 3 8.56 S 13.3 AU 40.0L 144 0.8 1 YOS Ibaraki, Japan (Still visible, but extremely diffuse and hard to see.) 2005 2 9.05 S 12.4 HS 25.6L 84 1.3 3 BIV Poigny-la-foret 2005 2 6.984 S 12.6 AU 31.0J 109 1.2 0 DIJ Lauwersoog 2005 2 6.981 S 12.7 AU 31.0J 109 1.6 1/ BOU Lauwersoog 2005 2 5.80 S 13.1 HS 40.0L 75 1.2 0/ YOS Ibaraki, Japan (Extremely diffuse as before. The surface brightness became fainter, so now it is difficult to see. In the same field with NGC 4710 [11.0 mag], much brighter than 62P.) 2005 1 19.16 S 11.6 TK 25.6L 42 2.0 3 BIV Poigny-la-Foret 2005 1 8.78 S 11.0 TJ 40.0L 75 5.0 2 YOS Ibaraki, Japan (Very large! Very diffuse, but easy to see.) 2004 12 20.11 S 11.8 HS 25.6L 84 2.0 2 BIV Poigny-la-Foret 2004 12 14.67 S 11.8 GA 25.4L 71 SEA Cowra, NSW 2004 12 13.12 S 11.6 TK 20.3L 40 2.0 3 BIV Haute Provence Obs. 2004 12 12.14 S 11.9 HS 20.3L 95 2.0 4 BIV Haute Provence Obs. 2004 12 11.77 S 11.8 HS 40.0L 144 2.4 2 YOS Gunma, Japan (Very wide and diffuse. Much brighter than in November, and easy to see with a large telescope.) 2004 12 9.16 S 12.2 TK 20.3T 77 2 2 GON Aralla, León 2004 11 21.077 S 12.7 AU 31.0J 89 2.0 0/ DIJ Sint Annen 2004 11 21.075 S 12.3 AU 31.0J 89 2.2 2/ BOU Sint Annen 2004 11 17.021 S 12.6 TK 30.0T 74 1.5 1 LOO Le Castellard, France 2004 11 16.188 S 12.4 TK 30.0T 74 1.4 3 LOO Le Castellard, France 2004 11 16.16 S 12.8 TK 20.3T 77 1.7 2 GON Camposagrado, León 2004 11 9.77 S 13.8 HS 40.0L 144 2.0 1/ YOS Gunma, Japan