Albert Marth discovered NGC 4803 = m 245 on 25 Mar 1865 and noted "eF, eS, R, lbM." His position is accurate.
400/500mm - 17.5" (4/4/92): very faint, very small, elongated 3:2 SW-NE. Overpowered by a mag 9.5 star at a SE edge 0.7' from center. The NGC 4795/NGC 4796 pair is 13' SW.
Notes by Steve Gottlieb