Édouard Stephan discovered NGC 2644 = St IX-16 on 6 Feb 1877 and recorded "eF, pL, irr oval, several small points [involved]." His position matches UGC 4533. The same night he discovered NGC 2174, a large, bright emission nebula in Orion.

400/500mm - 17.5" (2/13/88): fairly faint, fairly small, oval ~N-S, weak concentration. A pretty double star mag 13.5/14 at 17" separation lies 3.0' S of center.

Notes by Steve Gottlieb