Astrophysics (Index)About

NGC 3201

(Caldwell 79)
(globular cluster in which a black hole has been identified)

NGC 3201 (aka Caldwell 79) is a globular cluster with a radius of 40 ly and a presumed age of more than 10 gigayears (one determination is 10.24 Gy). It is of interest because a probable stellar black hole has been identified, using the radial velocity of a star that indicates it is orbiting something invisible and very massive. It is assumed that globular clusters generally host multiple stellar mass black holes, simply based upon the large number of resident stars, but currently they can only be identified when specific clues are available, such as in this case.

(globular cluster,RV method)
Further reading:
/Lookback Years
~05kpc16.0klyNGC 3201
Coordinates:NGC 3201