Type

Stellar mass

Location

In M33, the Triangulum galaxy

Finder Chart

Distance

2.7 million light-years (0.84 megaparsecs)

Mass

About 15.7 times the mass of the Sun

Size

Diameter roughly 60 miles (95 km)

Discovery Methods

• Detection of an accretion disk
• Measuring the motions of a companion star

1

An artist's concept shows M33 X-7 and its supergiant companion star. An accretion disk of hot gas encircles the black hole. [NASA/CXC/M.Weiss]

This document was last modified: August 13, 2008.