Alternate Names

Nova Cygni 1989, GS 2023+338

Type

Stellar mass

Location

in the constellation Cygnus

Finder Chart

Distance

7,800 light-years (2400 parsecs)

Mass

10 to 15 times the mass of the Sun

Size

Diameter roughly 37-56 miles (60-90 km)

Discovery Methods

• Detection of a jet
• Measuring the motions of a companion star

1

Hot gas from a "normal"� companion star forms a hot disk around a black hole in this artist's concept. The black hole is at the middle of the blue accretion disk at top. [NASA/ESA/Felix Mirabel]

This document was last modified: June 23, 2007.