Stephane Javelle discovered IC 582 = J. 2-658, along with IC 583, on 16 Dec 1893. His position is accurate.

600/800mm - 24" (4/13/18): at 375x; fairly faint, fairly small, irregularly round, ~36"x30". Slightly irregular surface brightness with a very small slightly brighter nucleus. Forms a close (physical) pair (Holm 155 at z = .025) with fainter IC 583 1.2' E.

Notes by Steve Gottlieb