NGC 3506 (also MCG 2-28-47, UGC 6120 and PGC 33379) is a magnitude +12.6 spiral galaxy located 294 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 March 1784.
Right Ascension 11h 03m 12.8s, Declination Dec +11° 04' 37"
