|A Chandra X-ray Observatory image of RX J1242-11.|
|Observation data (J2000 epoch)|
|Right ascension||12h 42m 36.9s|
|Declination||−11° 19′ 35″|
|Distance||650 Mly (200 Mpc)|
|Notable features||Pair of Galaxies = [KG99] A + [KG99] B.|
RX J1242.6−1119A (often abbreviated RX J1242−11) is an elliptical galaxy located approximately 200 megaparsecs (about 650 million light-years) from Earth. According to current interpretations of X-ray observations made by the Chandra X-ray Observatory and XMM-Newton, the centre of this galaxy is a 100 million solar mass supermassive black hole which was observed to have tidally disrupted a star (in 1992 or shortly before). The discovery is widely considered to be the first strong evidence of a supermassive black hole ripping apart a star and consuming a portion of it.
- Komossa, S.; Halpern, J.; Schartel, N.; Hasinger, G.; Santos-Lleo, M.; Predehl, P. (May 2004), "A Huge Drop in the X-Ray Luminosity of the Nonactive Galaxy RX J1242.6-1119A, and the First Postflare Spectrum: Testing the Tidal Disruption Scenario", The Astrophysical Journal Letters, 603: L17–L20, arXiv:astro-ph/0402468, Bibcode:2004ApJ...603L..17K, doi:10.1086/382046
- NASA: "Giant Black Hole Rips Apart Unlucky Star"
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