Albert Marth discovered NGC 5148 = m 257 on 30 Apr 1864 and noted "eF, S." His position matches CGCG 044-086 = PGC 47060.
400/500mm - 18" (5/29/05): extremely faint, very small, round, 15" diameter. Located 30" SW of a mag 14.5 star.
Notes by Steve Gottlieb