Animated astrometric observations of the gravitational microlensing of OGLE-2011-BLG-0462/MOA-2011-BLG-191
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| Object type | black hole |
|---|---|
| Other designations | MOA-2011-BLG-191 |
Observation data | |
| Constellation | Sagittarius  |
| J2000.0 (17:51:40.19) | |
| Declination | J2000.0 (-29:53:26.3) |
| Distance | 5,610 ly (1,720 pc) |
| Mass | 6.03 M☉ |
 Related media on Wikimedia Commons | |
OGLE-2011-BLG-0462, also known as MOA-2011-BLG-191, is a stellar-mass black hole isolated in interstellar space. OGLE-2011-BLG-0462 lies at a distance of 1,720 parsecs (5,610 light years) in the direction of the galactic bulge in the constellation Sagittarius. The black hole has a mass of about 6.03 M☉.[1] OGLE-2011-BLG-0462 is the first truly isolated black hole which has been confirmed.[2][3][4]
OGLE-2011-BLG-0462 was discovered through microlensing when it passed in front of a background star that was 20,000 light years away from Earth. The black hole's gravity bent the star's light, causing a sharp spike in brightness that was detected by the Hubble Space Telescope. It took six years to confirm the existence of OGLE-2011-BLG-0462. Its initial kick velocity has been estimated to have an upper limit of 100 km/s.[5][6] No significant X-ray emission has been detected from gas accreting onto the black hole indicating that it is truly isolated.[7]
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