Type

Stellar mass

Location

In the constellation Ursa Major

Finder Chart

Distance

6,000 light-years

Mass

7 times the mass of the Sun

Size

Diameter 26 miles (42 km), equal to the size of a large city.

Discovery Methods

• Measuring the motions of stars
• Measuring X-rays

Measuring X-rays

More about black hole discovery methods »

This document was last modified: November 19, 2009.