Lewis Swift discovered NGC 933 = Sw. II-21 on 11 Sep 1885 with the 16" refractor at Warner Observatory, on the same night he found Sw. II-20 = NGC 920. His position is accurate (as opposed to NGC 920) and matches UGC 1956 = PGC 9465.

400/500mm - 17.5" (11/26/94): faint, small, round, 0.8' diameter, weak concentration but no well-defined core. A mag 15 star is 30" N. Located 8.8' SW of mag 7 SAO 38067. Forms a pair with IC 1799 6.6' NW. This galaxy makes a right angle with IC 1799 to the NW and the bright star NE.

Notes by Steve Gottlieb