Heinrich d'Arrest discovered NGC 4934 on 20 Apr 1865 with the 11-inch refractor at Copenhagen. He noted this object was situated 16 sec of RA following NGC 4931, which he also discovered, so the identification is certain.

400/500mm - 17.5" (5/19/01): faint, small, very elongated 4:1 WNW-ESE, 0.4'x0.1', low even surface brightness. Slightly smaller and fainter than NGC 4931 3.4' W. Third of three on a line with NGC 4929 7' WNW within AGC 1656.

Notes by Steve Gottlieb