John Herschel discovered NGC 4010 = h1040 on 26 Apr 1830 and noted "F; mE; vglbM; 100" l, 25" br." His position is 2' southwest of center of UGC 6964, bu the identification is certain.

400/500mm - 17.5" (4/7/89): faint, large, edge-on WSW-ENE, weak concentration. Forms a pair with NGC 4001 6' NW. Member of the NGC 3877 subgroup of the M109 (NGC 3992) group = LGG 258.

Notes by Steve Gottlieb