Messier 85 (also known as M85 or NGC 4382 or PGC 40515 or ISD 0135852) is a lenticular galaxy, or elliptical galaxy for other authors,[4] in the Coma Berenices constellation.
[6] M85 is extremely poor in neutral hydrogen[7] and has a very complex outer structure with shells and ripples that are thought to have been caused by a merger with another galaxy that took place between 4 and 7 billion years ago,[7] as well as a relatively young (<3 billion years old) stellar population on its centermost region, some of it in a ring, that may have been created by a late starburst.
[8] Like other massive, early-type galaxies, it has different populations of globular clusters.
[6] While indirect methods imply that Messier 85 should contain a central supermassive black hole of around 100 million solar masses,[9] velocity dispersion observations imply that the galaxy may entirely lack a central massive black hole.
[11] Compared to other early-type galaxies, M85 emits a relatively smaller proportion of X-rays.