Édouard Stephan discovered NGC 3363 = St XII-40 on 22 Mar 1882 and recorded "F, pS, iR, lbM, r." His position is accurate.
400/500mm - 17.5" (3/28/92): faint, small, elongated 3:2 NNW-SSE, 1.0'x0.7', even surface brightness. A mag 12 star is 1.5' E of center and 1.0' off the edge. NGC 3353 lies 21' NW.
Notes by Steve Gottlieb