NGC 4004 (also NGC 4004A, IRAS 11555+2809, MCG 5-28-60, UGC 6950 and PGC 37654) is a magnitude +13.7 spiral galaxy located 155 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 11th April 1785.
Right Ascension 11h 58m 05.1s, Declination +27° 52' 43"
