William Herschel discovered NGC 4003 = H III-345 = h1035, along with NGC 4002, on 10 Apr 1785 (sweep 394). WH provided a single position for both objects, but JH measured fairly accurate positions.

CGCG, UGC and MCG equate NGC 4003 with NGC 4007, but the correct equivalence is NGC 4005 = NGC 4007.

400/500mm - 17.5" (2/20/88): faint, small, oval, weak concentration. Forms a pair with NGC 4002 4.6' N.

Notes by Steve Gottlieb