NGC 4003 (also MCG 4-28-105, UGC 6948 and PGC 37646) is a magnitude +13.3 face-on spiral galaxy located 299 million light-years away in the constellation Leo.
The galaxy was discovered by German-British astronomer William Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Datchet, Berkshire, on the 10th April 1785.
Right Ascension 11h 57m 59.0s, Declination +23° 07' 31"
