* Astronomy

NGC 7550 (also Arp 99, MCG 3-59-15, UGC 12456 and PGC 70830) is a magnitude +12.2 elliptical galaxy located 233 million light-years away in the constellation Pegasus.

With NGC 7549 it is catalogued as Arp 99.

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 18th September 1784.

Right Ascension 23h 15m 16.0s, Declination +18° 57' 39"