Royal H. Frost discovered IC 3392 = F. 920 on a plate taken on 7 May 1904 at Harvard's Arequipa station using the 24" f/5.6 Bruce photographic refractor. He noted "possible spiral, ellip, 1.5' by 0.3' at 225°, B * M."

400/500mm - 17.5" (5/23/87): faint, fairly small, elongated SW-NE, weak concentration. Located 14' E of NGC 4419.

Notes by Steve Gottlieb