NGC 3665 (also IRAS 11220+3902, MCG 7-24-3, UGC 6426 and PGC 35064) is a magnitude +10.8 spiral galaxy located 94 million light-years away in the constellation Ursa Major.
The galaxy was discovered by German-British astronomer William Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Windsor Road, Slough, on the 23rd March 1789.
Right Ascension 11h 24m 43.6s, Declination +38° 45' 47"
