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49 Librae
49 Librae is the Flamsteed designation for a spectroscopic binary〔 star system in the Zodiac constellation of Libra. It has an apparent visual magnitude of 5.47,〔 making it faintly visible to the naked eye from dark suburban skies. Measurements made with the Hipparcos spacecraft show an annual parallax shift of 0.02840″,〔 which is equivalent to a distance of roughly from the Sun. The combined spectrum of 49 Librae matches a stellar classification of F7 V,〔 with the luminosity class of V suggesting the primary forms a main sequence star like the Sun. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「49 Librae」の詳細全文を読む
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