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Black Holes Encyclopedia
Stats

Alternate Names

Cygnus XR-1

Type

Stellar mass

Location

In the constellation Cygnus

Finder Chart

Distance

6,000 to 10,000 light-years

Mass

15 times the mass of the Sun

Size

Diameter 55 miles (90 km), equal to the size of a large American city

Discovery Methods

Image

Cygnus X-1

A view of the region around Cygnus X-1, with the system outlined by the red box. [DSS]

This document was last modified: June 25, 2012.