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HD 34557
HD 34557 is a double star in the northern constellation of Auriga. The fainter star has an angular separation of 0.380″ from the primary component.〔 They have a combined apparent magnitude of 5.52,〔 making HD 34557 faintly visible to the naked eye from dark skies. Based upon parallax measurements made with the Hipparcos satellite, this system is roughly 280 light years away.〔 The primary component is spinning rapidly, with a projected rotational velocity of 217 km/s.〔 It has a stellar classification of A3V,〔 making it an A-type main sequence star.
==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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