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HD 2421
HD 2421 is a class A2V (white main-sequence) star in the constellation Andromeda. Its apparent magnitude is 5.18 and it is approximately 283 light years away based on parallax.
It is a spectroscopic binary with period 3.96 days and eccentricity 0.15, reported by Baker in 1909 and orbit computed by Udick in 1912.〔 9th Catalogue of Spectroscopic Binary Orbits, (HD 2421 ) (accessed 20 September 2015) 〕
==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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