William Herschel discovered NGC 3517 = H II-884 = h817 on 8 Apr 1793 (sweep 1038) and noted "F, S, R, bM." On 9 Feb 1831 (sweep 323) John Herschel called it "eF; R; 12"; vglbM." His position matches UGC 6144.
400/500mm - 17.5" (3/12/88): fairly faint, fairly small, round, diffuse edges, broad concentration.
Notes by Steve Gottlieb