| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 09h 55m 50.01s |
| Declination | 69° 40′ 46.0″ |
| Database references | |
| SIMBAD | data |
M82 X-1 is an ultra-luminous X-ray source located in the galaxy M82. It is a candidate intermediate-mass black hole, with the exact mass estimate varying from around 100 to 1000 solar masses. [1] [2] [3] One of the most luminous ULXs ever known, its luminosity exceeds the Eddington limit for a stellar mass object.