Calvera
Star
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In astronomy, Calvera is an X-ray source in the constellation Ursa Minor, identified in 2007 as an isolated neutron star. It is one of the hottest and closest of its kind to Earth. Wikipedia
Constellation: Ursa Minor
Distance to Earth: 619.7 light years
Age: 285,000 years
Distance: ≤2000 pc
Rotation: 59.199071070 ms
SIMBAD: data