Globular clusters ESO 444-46 has an estimated population of about 27,000
globular clusters which may be one of the largest populations ever studied. This is in contrast to 15,000 globular clusters in
Messier 87, and 200 in the
Milky Way. However, this large number may be due to the addition of
Intracluster globular clusters since the galaxy lies about 1 arcmin of the center of Abell 3558.
Supermassive black hole A calculation using the spheroidal luminosity method by estimating the stellar density of the central region using its brightness, yielded a mass of 77.6 billion solar masses (with the range being to ). This would make it one of the
most massive black holes known – nearly twelve times the mass of the black hole in Messier 87, and 18,000 times more massive than
Sagittarius A* (Sgr A*), the Milky Way's central black hole. A black hole of this mass has a
Schwarzschild radius of 1,530
AU (about 461 billion km in diameter). Alternative calculations using the
M-sigma relation and the newer core break radius method yielded estimates of and , respectively. == See also ==