Royal H. Frost discovered IC 3388 = F. 918 on a plate taken on 10 May 1904 at Harvard's Arequipa station using the 24" f/5.6 Bruce photographic refractor. He noted "R, lbM, 0.2' dia, magn 15."

600/800mm - 24" (4/28/14): very faint to faint, small, round, 15"-18" diameter, low even surface brightness. Located 15' SE of NGC 4438. Slightly brighter IC 3393 lies 6.5' NNE.

Notes by Steve Gottlieb