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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Epsilon Centauri ： ウィキペディア英語版 Epsilon Centauri Epsilon Centauri (ε Cen, ε Centauri) is a star in the southern constellation of Centaurus. It is one of the brightest stars in the constellation with a slightly variable apparent visual magnitude of +2.30. Parallax measurements put it at a distance of around from Earth. In Chinese, (), meaning ''Southern Gate'', refers to an asterism consisting of ε Centauri and α Centauri.〔 ''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, ε Centauri itself is known as (, (英語:the First Star of Southern Gate).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 25 日 )〕 ε Centauri is a massive star with nearly 12 times the mass of the Sun.〔 The spectrum matches a stellar classification of B1 III,〔 indicating this is an evolved giant star. It is radiating more than 15,000〔 times the luminosity of the Sun from its outer atmosphere at an effective temperature of 24,000 K,〔 giving it the blue-white hue of a B-type star.〔 This is classified as a Beta Cephei type variable star with a primary period of 0.16961 days (4 hours 4 minutes), completing 5.9 cycles per day.〔 During each cycle, the brightness of the star varies from apparent magnitude +2.29 to +2.31. This star is a proper motion member of the Lower-Centaurus Crux sub-group in the Scorpius-Centaurus OB association, the nearest such association of co-moving massive stars to the Sun.〔 Epsilon Centauri is a relatively young star, with an age of around 16 million years.〔 ==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「Epsilon Centauri」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.