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* * * * * 21P/Giacobini-Zinner * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2005 10 24.80 S[12.5 AU 40.0L 144 !0.8 YOS Gunma, Japan (Getting higher, but already too faint to see. It has gone while I could not observe it on several cloudy nights.) 2005 10 11.73 13.2 28.0T 133 1 4 MAT Stockport Observatory, SA 2005 8 5.77 S 10.4 TJ 40.0L 144 2.3 3/ YOS Gunma, Japan (Extremely low, and the comet is very faint, so hard to see. Somewhat condensed. It was much easier to see in spring when it located high.) 2005 8 4.12 S 11.2 TK 40.7L 116 1.3 4 BIV Valdrôme 2005 8 2.14 S 10.4 TK 20.3T 100 3 4 GON Alto del Castro - Aralla, León 2005 7 31.11 S 10.5 TK 40.7L 58 1.5 4 BIV Valdrôme 2005 7 28.76 S 9.9:TJ 40.0L 144 1.7 3/ YOS Gunma, Japan (Low, the sky was dim, and hard to see. More diffused than I thought.) 2005 7 19.13 S 9.8 TK 20.3T 77 4 4 GON Alto del Castro - Aralla, León 2005 7 16.12 S 9.8 TK 20.3T 77 4 4 GON Alto del Castro - Aralla, León 2005 7 15.097 S 10.3 TK 31.0J 72 1.8 3 DIJ Revest-du-Bion, France 2005 7 15.096 S 10.6 TK 31.0J 72 2.4 3/ BOU Revest-du-Bion, France 2005 7 14.089 S 10.7 TK 31.0J 72 1.4 2 DIJ Revest-du-Bion, France 2005 7 14.086 S 10.6 TK 31.0J 72 1.8 3 BOU Revest-du-Bion, France 2005 7 11.078 S 10.5 TK 31.0J 72 2.0 4 BOU Revest-du-Bion, France 2005 7 11.075 S 10.6 TK 31.0J 72 2.0 2 DIJ Revest-du-Bion, France 2005 7 10.13 S 10.6 TK 20.3T 67 2.5 5 0.1 280 BIV Pico-Veleta, Spain 2005 7 9.13 S 10.5 TK 20.3T 67 2.3 6 0.1 280 BIV Pico-Veleta, Spain 2005 7 9.087 S 10.4 TK 31.0J 72 2.0 4/ BOU Revest-du-Bion, France 2005 7 9.083 S 10.1 TK 31.0J 72 1.4 4 DIJ Revest-du-Bion, France 2005 7 8.15 S 10.3 TK 20.3T 67 2.0 6 0.1 285 BIV Pico-Veleta, Spain 2005 7 7.14 S 10.2 TK 20.3T 67 2.2 6 0.13 270 BIV Pico-Veleta, Spain 2005 7 6.14 S 10.5 TK 20.3T 67 2.5 7 0.10 270 BIV Pico-Veleta, Spain 2005 7 6.11 S 9.4 TK 20.3T 77 4 4 0.1 280 GON Alto del Trichero - Soto y Amío, León 2005 7 6.081 S 9.9 TK 31.0J 58 1.5 4/ DIJ Revest-du-Bion, France 2005 7 6.078 M 10.2 TK 31.0J 58 2 4/ BOU Revest-du-Bion, France 2005 7 3.13 S 10.4 TK 20.3T 67 2.5 6 0.1 270 BIV Pico-Veleta, Spain 2005 7 3.11 S 9.4 TK 20.3T 77 4 4 GON Alto del Castro - Aralla, León (Mountain location, clear sky. Altitude: 11 deg.) 2005 7 2.14 S 10.3 TK 20.3T 67 2.5 5 0.10 275 BIV Pico-Veleta, Spain 2005 7 2.12 S 9.7 TK 20.3T 77 3 4 GON Alto del Castro - Aralla, León (Mountain location, clear sky. Altitude: 12 deg. Strong interference from the nearby Moon. Coma enhanced through Swan band filter.) 2005 6 16.10 S 9.6 TK 10.0B 25 3.5 4 GON Alto del Castro - Aralla, León 2005 6 16.09 S 9.9 TK 20.3T 77 3.0 5 GON Alto del Castro - Aralla, León 2005 6 12.07 S 10.5 TK 40.7L 116 1.5 6 0.05 260 BIV Ablis 2005 6 6.11 S 10.2 TK 20.3T 77 3.0 4 GON Alto del Castro - Aralla, León 2005 6 3.08 S 10.7 TK 40.7L 58 1.8 5 BIV Ablis 2005 6 2.09 S 10.5 TK 20.3T 77 2.5 4 GON Alto del Trichero - Soto y Amío, León 2005 5 31.06 S 10.6 TK 40.7L 58 1.5 5 BIV Ablis 2005 5 18.12 S 11.2 TK 20.3T 100 2.5 5 GON Alto del Trichero - Soto y Amío, León 2005 5 13.049 S 11.5 AU 31.0J 89 1.6 2 DIJ Sint Annen 2005 5 13.047 S 11.3 AU 31.0J 89 1.8 3 BOU Sint Annen 2005 5 12.83 S 11.5:TK 10.0B 25 2 3 MAT Stockport Observatory, SA 2005 5 12.10 S 11.6:TK 40.7L 116 1.5 5 BIV Poigny-la-Forêt 2005 5 8.057 S 11.9:AU 25.4J 88 1 2 DIJ Sint Annen 2005 5 8.050 S 11.7 AU 25.4J 88 1.5 4 BOU Sint Annen 2005 5 7.14 S 11.8 TK 20.3T 100 2.3 5 GON Sierra del Aramo, Asturias 2005 5 7.10 S 11.1 TK 20.3T 67 2.4 5 0.07 260 BIV Pico-Veleta, Spain 2005 5 6.12 S 11.4 TK 20.3T 67 2.0 5 0.07 260 BIV Pico-Veleta, Spain 2005 5 5.066 S 11.9 AU 25.4J 88 1.2 4 BOU Sint Annen 2005 5 4.76 S 11.7:AU 40.0L 144 0.8 3 YOS Gunma, Japan (Through dim clouds, so probably inaccurate. My observation on May 3 must be accurate.) 2005 5 3.74 S 12.1 AU 40.0L 144 1.1 4 YOS Gunma, Japan (Already very bright, easy to see. The condensation is not so strong, that is very different from the cases of 78P or 9P at the beginning.) 2005 5 2.15 B 12.3 TK 20.3T 100 0.8 6 GON Sierra del Aramo, Asturias (Mountain location, very clear sky. Some moonlight interference. Motion checked during a 1-hour period.) 2005 4 5.78 S[12.4 AU 40.0L 144 !0.7 YOS Ibaraki, Japan (Not visible. The sky was dim, not clear. Interference by a magn. 14.3 star located near the position of the comet.)