* * * * * C/2009 Y1 (Catalina) * * * * *

Year Mn Day    MM  Mag Ref Scope Pwr coma  DC tail p.a. Obs  Site
2011  8 31.91   S 13.0:UD  25.4L 171  0.7  3            IVA  Saratov
2011  8 29.94   S 14.0:UD  20.3L  60  0.5  3            IVA  Saratov
2011  8  9.78   S 13.6:AU  40.0L 144  0.6  6            YOS  Kita-karuizawa, Gunma
(Hard to observe due to the poor sky condition.)
2011  1 24.82   S 13.3 HN  20.3T 200  0.4  6            GON  Pandorado, León
(Nearby field stars checked in DSS. Comparison stars taken from Henden photometry near V378 Peg.
Mountain location, very clear sky.)
2010 12  4.41   S 12.9 TA  40.0L 144  0.7  7            YOS  Kita-karuizawa, Gunma
(Tiny, but very easy to see with strong condensation. I could find the comet quickly after
I moved my telescope to the comet's field.)
2010 11 28.84   S 12.8 HN  20.3T 100  1.2  5            GON  Aralla, León
(Nearby field stars checked in DSS. Comparison stars taken from Henden photometry near V2176 Cyg.
Mountain location, very clear sky.)
2010 11  7.796  S 13.0 AQ  31.0J 109  0.7  3/           DIJ  Burlage
2010 11  7.794  S 13.1 AQ  31.0J 109  0.6  3/           BOU  Burlage, Germany
2010 11  6.41   S 13.2 HS  40.0L 257  0.7  5            YOS  Kita-karuizawa, Gunma
2010 11  5.54   S 13.6 TA  40.0L 257  0.4  6            YOS  Kita-karuizawa, Gunma
(Tiny, but clearly visible with a strong condensation.)
2010 10 18.13   S 13.3 HN  20.3T 100  0.7  4            GON  Alto del Castro - Aralla, León
(Nearby field stars checked in DSS. Comparison stars taken from Henden photometry - GSC4414 field.)
2010 10 17.008  S 13.4 AQ  31.0J 155  0.5  3            DIJ  Burlage
2010 10 17.005  S 13.7 AQ  31.0J 155  0.5  4            BOU  Burlage, Germany
2010 10  9.832  S 13.7 AQ  31.0J 155  0.6  2/           DIJ  Burlage
2010 10  9.828  S 13.7 AQ  31.0J 155  0.7  4            BOU  Burlage, Germany
(Small, somewhat condensed object. Position checked vs DSS. Comparison stars taken from APASS_DR1.)