Albert Marth discovered NGC 2858 = m 161 on 3 Mar 1864 and noted "vF, S, mbM." His position matches UGC 4989 = PGC 26556.
400/500mm - 17.5" (3/25/95): faint, small, slightly elongated NW-SE, 0.5' diameter. Sharp concentration with a fairly bright stellar nucleus surrounded by a small faint halo.
Notes by Steve Gottlieb