NGC 3540 (also NGC 3548, UGC 6196 and PGC 33806) is a magnitude +13.8 elliptical galaxy located 294 million light-years away in the constellation Ursa Major. In the sky it can be found roughly 17' south of HD 96813.
The galaxy was discovered by British astronomer John Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Windsor Road, Slough, on the 11th March 1831. The galaxy was rediscovered by John Herschel in February 1832 and relisted as NGC 3548.
Right Ascension 11h 09m 16.0s, Declination Dec +36° 01' 17"
