Heinrich d'Arrest discovered NGC 4854 on 24 Apr 1865 with the 11-inch refractor at Copenhagen. His RA from a single position is 6 seconds too small.
400/500mm - 17.5" (4/28/90): very faint, small, slightly elongated SW-NE. Member of AGC 1656 with NGC 4853 5.2' SW.
Notes by Steve Gottlieb