Heinrich d'Arrest discovered NGC 4931 on 10 May 1863 with the 11-inch refractor at Copenhagen. His position matches UGC 8154. On 20 Apr 1865 he measured the position again and discovered NGC 4934, just 17 sec of RA following.

The RA in the RNGC is poor and this galaxy is misplotted in the first edition of the Uranometria 2000.

400/500mm - 17.5" (5/19/01): fairly faint, fairly small, very elongated 3:1 ~E-W, 0.5'x0.15'. Contains a small bright core that occasionally appears stellar. A mag 13.5 star lies 1.6' NE. Situated nearly at the midpoint of NGC 4927 3.7' WNW and NGC 4934 3.4' E within AGC 1656.

Notes by Steve Gottlieb