Lewis Swift discovered NGC 5939 = Sw. I-45 on 11 Jul 1883 and noted "pB; lE; pS." His position matches UGC 9854. This galaxy was discovered just 2 nights after he started systematically searching for nebulae with the 16-inch refractor

400/500mm - 17.5" (6/14/96): faint, fairly small, elongated 3:2 SW-NE, 40"x25", even surface brightness.

Notes by Steve Gottlieb