* * * * * 27P/Crommelin * * * * *

Year Mn Day    MM  Mag Ref Scope Pwr coma  DC tail p.a. Obs  Site
2011  7  5.10   S 10.1 TK  20.3T 100   3   3            GON  Alto del Castro - Aralla, León
(Mountain location, very clear sky. Beginning of astronomical twilight. Altitude: 8 deg.)
2011  7  1.11   S 10.3 TK  20.3T 100  3.5  3            GON  Alto del Castro - Aralla, León
(Observation made from mountain location under very good seeing conditions. Nearby field stars checked in DSS.
Beginning of astronomical twilight. Altitude: 11 deg.)