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HD 34790
HD 34790 is a double-lined spectroscopic binary〔 star system in the northern constellation of Auriga. It has a combined apparent magnitude of 5.66,〔 which means it is faintly visible to the naked eye. Based upon observations by the Hipparcos satellite, it is located around 289 light years away.〔 It has a combined stellar classification of A1Vs,〔 matching that of an A-type main sequence star, and shines with 35 times the luminosity of the Sun.〔
The two stars orbit each other with a period of only 2.15 days and an eccentricity of zero, indicating their orbit is close to circular.〔 They are orbiting sufficiently close to each other that their rotation periods have most likely become tidally locked—meaning they always maintain the same face toward each other.〔
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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