NGC 3988
NGC 3988 is a compact elliptical galaxy located 304 million light-years away in the constellation Leo. It was discovered on April 13, 1831, by astronomer John Herschel. NGC 3988 is a field galaxy, and is part of the Coma Supercluster.
NGC 3988 is host to a supermassive black hole with an estimated mass of 7.3 × 108 M☉.