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2 Centauri
Star in the constellation Centaurus From Wikipedia, the free encyclopedia
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2 Centauri is a single[13] star in the southern constellation of Centaurus, located approximately 183 light-years from Earth.[3] It has the Bayer designation g Centauri;[12] 2 Centauri is the Flamsteed designation. This object is visible to the naked eye as faint, red-hued star with an apparent visual magnitude of 4.19.[4] It is moving away from the Earth with a heliocentric radial velocity of +41 km/s.[8] The star is a member of the HR 1614 supercluster.[14]
This is an evolved red giant star with a stellar classification of M5 III.[6] In 1951, Alan William James Cousins announced that the star, then called g Centauri, is a variable star.[15] It was given its variable star designation, V806 Centauri, in 1978.[16] It is classified as a semiregular variable star and its brightness varies from magnitude +4.16 to +4.26[5] with a period of 12.57 days.[17] The star has around 70[18] times the Sun's radius and is radiating 72[4] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,398 K.[11]
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