A type IIP magnitude 17.2 supernova, 2009B, was discovered by Tom Boles on the 2nd January, 2009, in the galaxy UGC 4423 in the constellation Camelopardalis. The supernova is located 8' West and 7' South from the center of the galaxy.
Position(2000): RA =08 30 51.47, Dec = +74 41 08.1 CBET 1646 (Subscription)