* * * * * C/2011 C1 (McNaught) * * * * *

Year Mn Day    MM  Mag Ref Scope Pwr coma  DC tail p.a. Obs  Site
2011  6  4.11   S 10.8 TK  20.3T 100   2   3/           GON  Alto del Castro - Aralla, León
(Astronomical twilight. Altitude: 12 deg.)
2011  4 15.128  S  9.4 TK  15.5L  29   5   4            DIJ  Burlage
2011  4 13.17   S  8.6 TK  10.0B  25   6   3/           GON  Alto del Castro - Aralla, León
2011  4 13.16   S  8.8 TK  20.3T  77   6   4   0.3 280  GON  Alto del Castro - Aralla, León
2011  4 12.75   S  9.5 AA  10.0B  25   4   3            SEA  The Entrance, NSW
2011  4 12.34   S  9.3 TK  10.0B  20   5   3            GOI  Araçatuba
2011  4  8.77   S  9.7 AA  10.0B  25   6                SEA  The Entrance, NSW
(Enhanced using Swan Band filter.)
2011  4  8.34   S  9.3 TK  10.0B  20   5   3            GOI  Araçatuba
2011  4  8.33   S  9.5 TK  22.0L  60   4   4/           GOI  Araçatuba
2011  4  7.131  S  9.4 TK   8.0B  15  4.5  4            DIJ  Burlage
2011  4  7.126  S  9.2 TK  15.6L  36   5   3            BOU  Garmerwolde
2011  4  5.19   S  8.7 TK  10.0B  25   6   3/           GON  Alto del Castro, León
2011  4  5.18   S  8.9 TK  20.3T  77   5   3/  0.2 270  GON  Alto del Castro, León
2011  4  2.142  S  9.5:TK   8.0B  15   4   4/           DIJ  Burlage
2011  4  1.19   S  9.1 TK  10.0B  25   8   3            GON  Alto del Castro, León
2011  4  1.18   S  9.3 TK  20.3T  77   6   3   0.2 260  GON  Alto del Castro, León
2011  3 31.19   S  9.7 TK  20.3L  40  3.0  4            BIV  La Palma Observatory, Canary Islands, Spain
2011  3 18.22   S 10.2 TK  20.3T 100  4.5  3            GON  Collada de Olleros de Alba, León
(Faint, diffuse outer coma. Obvious motion, observed over a 15-min period. Nearby field stars checked in DSS.
Observation made at moonset, in astronomical twilight. Mountain location, very clear sky.)