Heinrich d'Arrest discovered NGC 5807 on 14 Sep 1866 with the 11-inch refractor at Copenhagen and confirmed at 123x and 161x. His single position is on the west side of CGCG 318-009 = PGC 53373.
400/500mm - 17.5" (6/21/93): faint, very small, round, 15" diameter. A mag 12 star is 1.3' NW of center.
Notes by Steve Gottlieb