NGC 631 (also UGC 1153, MCG 1-5-7, ZWG 412.6, NPM1G +05.0064, PGC 5983) is a magnitude +14.0 elliptical galaxy located 259 million light-years away in the constellation Pisces.
The galaxy was discovered by German astronomer Albert Marth using a 121.92 cm (48 inch) reflector at William Lassell's Tigné Point observatory in Sliema, Malta on the 27th October 1864.
Right Ascension 01h 36m 47.0s, Declination 05° 50' 09"
