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Alpha Equulei : ウィキペディア英語版
Alpha Equulei

Alpha Equulei (α Equ, α Equulei) is a star in the constellation Equuleus. It has the traditional name Kitalpha (rarely ''Kitel Phard'' or ''Kitalphar),'' a contraction of the Arabic name قطعة الفرس ''(unicode:qiṭ‘a(t) al-faras)'' "a piece of the horse".
In Chinese, (), meaning Emptiness, is an asterism consisting of α Equulei and β Aquarii.〔 ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.〕 Consequently, α Equulei itself is known as (, (英語:the Second Star of Emptiness).)〔 (香港太空館 - 研究資源 - 亮星中英對照表 ), Hong Kong Space Museum. Accessed on line November 23, 2010.〕
Alpha Equulei collectively belongs to spectral class G0III and has apparent magnitude +3.92 and a luminosity approximately 75 times that of the Sun. Alpha Equulei is a unique spectroscopic binary star consisting of two components. Kitalpha is approximately 186 light years from Earth.
This star has 2.72 times the mass of the Sun, with a projected rotational velocity of 20.0 km s−1 and an estimated rotation period of 98.8 days.〔
== 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「Alpha Equulei」の詳細全文を読む



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