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In astronomy, Calvera is a nickname —based on the villain in the 1960 film The Magnificent Seven— of an X-ray source known as 1RXS J141256.0+792204 in the ROSAT All-Sky Survey Bright Source Catalog (RASS/BSC). It lies in the constellation Ursa Minor and is identified as an isolated neutron star. It is one of the closest of its kind to Earth.
Epoch J2000.0 Equinox J2000.0 (ICRS)
|Right ascension||14h 12m 55.867s|
|Declination||+79° 22′ 03.895″|
|Evolutionary stage||Neutron star|
The object is so-named because the seven previously known isolated neutron stars are known collectively as 'The Magnificent Seven'.
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- "RX J1412.9+7922". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 September 2020.
- "Rare dead star found near Earth". August 20, 2007. Archived from the original on July 13, 2014. Retrieved August 21, 2007.
- Rutledge, Robert; Fox, Derek; Shevchuk, Andrew (2008). "Discovery of an Isolated Compact Object at High Galactic Latitude". The Astrophysical Journal. 672 (2): 1137–43. arXiv:0705.1011. Bibcode:2008ApJ...672.1137R. doi:10.1086/522667. S2CID 7915388.
- Universe Today, Closest Neutron Star Discovered
- Pennsylvania State University. "Possible closest neutron star to Earth found" (Press release). August 20, 2007. Retrieved August 21, 2007.