Black Hole
One of the first black holes ever identified, formed from the collapse of a massive star.
| Type | Black Hole |
|---|---|
| Black hole type | Stellar |
| Distance from Earth | 7,200 ly |
| Diameter | 125 km |
| Mass | 4.30 × 10^31 kg |
| Apparent magnitude | 8.9 |
| Redshift | 0 |
| Hemisphere | Northern |
| Discovered | 1964 |
Its mass is 22 times the mass of the Sun.
The light reaching us from Cygnus X-1 tonight left it around 7,200 years ago.
It has been on record since 1964.
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