Heinrich d'Arrest discovered NGC 4148 on 7 Feb 1866 with the 11-inch refractor at Copenhagen. His position, measured twice, matches UGC 7158 and he accurately placed a mag 12 star at 3.8 seconds of time following (and 1.3' south).

400/500mm - 17.5" faint, small, slightly elongated ~E-W, small bright core, stellar nucleus. A mag 13 star is 1.4' SE and a mag 12 star 4' W.

Notes by Steve Gottlieb