NGC 4889

NGC 4889 is a very large elliptical galaxy, which lies almost in the center of the Coma cluster and about 11.5 may have brightness.

She is the type of the cD galaxies and dominates - along with a second, slightly less luminous giant galaxy called NGC 4874 - the gravitational field of the galaxy cluster. The two star systems have a high age and are probably formed from the merger of several small spiral nebulae. Your distance is about 300 million light years.

NGC 4889 was discovered on 11 April 1785 by the German - British astronomer William Herschel. 1973 declared Jack Sulentic and William Tifft RNGC in the galaxy NGC 4884 described by Heinrich Louis d'Arrest on 6 April 1864 as identical to NGC 4889th

In the center of NGC 4889, the largest (as of December 2011) is directly measured black hole with a mass estimated at 21 billion solar masses (' best fit ' from the range 6-37 billion solar masses).