About the approximate location of black holes

First of all, it is considered as a black hole and the brightest X-ray source in the whole sky detected by X-ray detectors. It is named Cygnus X- 1, located near the star η of Cygnus, and forms a binary system with the optical star HD226868.

Another celestial body is considered to be a black hole in the swordfish large magellanic cloud, called LMCX-3; There is also a celestial body suspected to be a black hole in Kirin, called A0620-00.