* * * * * C/2010 B1 (Cardinal) * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2011 2 4.96 S 13.5 HN 20.3T 206 0.7 5 GON Valle Peral - Lena, Asturias (Nearby field stars checked in DSS. Comparison stars taken from Henden photometry near V1261 Ori. Mountain location, very clear sky.) 2011 1 24.93 S 13.7 HN 20.3T 133 0.7 5 GON Pandorado, León (Nearby field stars checked in DSS. Comparison stars taken from Henden photometry near V1261 Ori. Mountain location, very clear sky.) 2011 1 9.933 S 13.9 HN 31.0J 109 0.5 5 DIJ Burlage 2011 1 9.928 S 14.0:HN 31.0J 109 0.6 4 BOU Burlage, Germany (Field checked vs DSS. Motion detected over about 30m. Comparison stars taken from Henden photometry near V653 Ori.) 2010 12 13.006 S 13.9 HN 31.0J 109 0.8 3 DIJ Burlage 2010 12 13.002 S 13.9 HN 31.0J 109 0.6 4/ BOU Burlage, Germany (Field checked vs DSS. Slight motion obvious after about 15m. Comparison stars taken from Henden photometry near CW Mon.) 2010 11 13.22 S 13.8 HN 20.3T 133 0.8 5 GON Collada Llomena - Ponga, Asturias (Nearby field stars checked in DSS. Comparison stars taken from Henden photometry near AK Cnc. Mountain location, very clear sky.) 2010 11 6.79 S 14.3 UV 40.0L 257 0.5 5 YOS Kita-karuizawa, Gunma (Unexpectedly visible visually, but very hard to see.)