* * * * * C/2008 C1 (Chen-Gao) * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2008 4 23.90 S 10.0 TK 20.3T 77 3.5 2 GON Alto del Castro - Aralla, León (Zodiacal light.) 2008 4 4.40 S 11.4 GA 25.4L 71 SEA Cowra, NSW 2008 4 3.96 S 9.6 TK 10.0B 25 5 3 GON Sierra del Aramo, Asturias (Zodiacal light.) 2008 4 3.40 S 11.4 GA 25.4L 71 SEA Cowra, NSW (Comet suspected only. Very faint and indistinct, only confirmed following evening.) 2008 3 31.847 S 9.6 TK 31.0J 58 3.3 2/ DIJ Lauwersoog 2008 3 31.844 S 9.9 TK 31.0J 58 3.5 2/ BOU Lauwersoog 2008 3 30.89 S 9.5 TK 10.0B 25 5 3 GON Sierra del Aramo, Asturias (Zodiacal light. Comet close to star of mag. 10.7 [TK].) 2008 3 29.86 M 9.7 TK 13.0L 33 3 5 NOV Konchezero 2008 3 28.95 S 9.5 TK 10.0B 25 5 3 GON Sierra de Penouta - Boal, Asturias 2008 3 26.77 M 9.9 TK 13.0L 65 4 2 NOV Konchezero 2008 3 10.95 S 9.8 TK 10.0B 25 5 2/ GON Sierra del Aramo, Asturias (Mountain location, very clear sky.) 2008 3 7.826 S 10.4 TA 15.6L 36 3 3 BOU Sint Annen 2008 3 5.95 S 10.1 TK 10.0B 25 5 1/ GON Alto del Trichero - Soto y Amío, León 2008 3 5.94 S 10.2 TK 20.3T 77 4 2 GON Alto del Trichero - Soto y Amío, León 2008 3 5.49 S 10.3 TJ 40.0L 36 3.5 3 YOS Mt. Hanadate, Ibaraki (Bright. But unexpectedly, it is a large nebulous comet with a very weak condensation.) 2008 3 1.85 S 10.2 TK 10.0B 25 4 2 GON Alto del Castro - Aralla, León 2008 3 1.84 S 10.4 TK 20.3T 77 4.0 2 GON Alto del Castro - Aralla, León 2008 2 27.815 S 11.7 TA 15.6L 63 1.3 2 DIJ Sint Annen 2008 2 27.810 S 11.4 TA 15.6L 63 2.0 2 BOU Sint Annen 2008 2 26.800 S 11.5 TA 31.0J 72 2.2 1/ BOU Sint Annen 2008 2 26.795 S 11.7 TA 31.0J 72 1.2 2 DIJ Sint Annen 2008 2 22.81 S 10.9 TK 20.3T 77 2.5 2 GON Aralla, León (Mountain location, very clear sky. Estimate made before moonrise.) 2008 2 13.05 S 11.3:TK 20.3T 133 2.0 2 GON Cueto Rosales - Riello, León (Mountain location, very clear sky. Estimate made after the moonset.) 2008 2 11.974 S 12.9 TA 31.0J 89 1.1 2 DIJ Sint Annen 2008 2 11.972 S 12.6 TA 31.0J 89 1.5 3 BOU Sint Annen 2008 2 10.963 S 12.7 TA 31.0J 89 1.5 2 DIJ Sint Annen 2008 2 10.960 S 12.6 TA 31.0J 89 1.3 3 BOU Sint Annen 2008 2 9.91 S 11.6 TK 20.3T 133 1.7 2/ GON Aralla, León (Brightening trend continues.) 2008 2 9.882 S 12.8 TA 31.0J 109 1.2 3/ BOU Sint Annen 2008 2 8.827 S 12.7 HN 31.0J 109 1.3 3 BOU Sint Annen (Comparison stars taken from nearby Henden sequence of BB Cas.) 2008 2 9.80 S 12.5 TA 36.8L 128 1.3 2/ GIL Noordwijk aan Zee 2008 2 6.96 S 12.2 TK 20.3T 133 1.5 2/ GON Aralla, León (Comet significantly brighter than two days ago.) 2008 2 6.868 S 13.1 TA 31.0J 109 1.3 2 DIJ Sint Annen 2008 2 6.861 S 13.0 TA 31.0J 109 1.2 3 BOU Sint Annen 2008 2 6.82 S 12.4 TA 36.8L 79 1.5 2/ GIL Noordwijk aan Zee (Difficult observation, comet next to star of magnitude 11.8.) 2008 2 4.89 S 12.8 TK 20.3T 133 1.2 3 GON Linares - Proaza, Asturias (Motion checked during a 85-min period. Nearby field stars checked in DSS. Mountain location, very clear sky.) 2008 2 4.847 S 13.3 TA 31.0J 109 1 1/ DIJ Sint Annen 2008 2 4.846 S 13.2 TA 31.0J 109 1.0 3/ BOU Sint Annen