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Epsilon Capricorni (ε Cap, ε Capricorni) is a triple star system in the constellation Capricornus. It also has the traditional star name Castra or Kastra, meaning "fort" or "military camp" in Latin. It is approximately 660 light years from Earth. In Chinese, (), meaning ''Line of Ramparts'', refers to an asterism consisting of ε Capricorni, κ Capricorni, γ Capricorni, δ Capricorni, ι Aquarii, σ Aquarii, λ Aquarii, φ Aquarii, 27 Piscium, 29 Piscium, 33 Piscium and 30 Piscium.〔 ''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 Capricorni itself is known as (, (英語:the Second Star of Line of Ramparts).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 7 日 )〕 The primary component, ε Capricorni A, is a blue-white B-type main sequence dwarf with a mean apparent magnitude of +4.51. It is classified as a Gamma Cassiopeiae type variable star and its brightness varies from magnitude +4.48 to +4.72. It is a spectroscopic binary, and the two subcomponents have apparent magnitudes of +5.0 and +6.3 and are separated by 0.0047 arcseconds (1 AU). Further out, 68 arcseconds away, is ε Capricorni B which is at least 13,000 AU, or 0.22 light years away from the close binary. It is an orange K-type giant with an apparent magnitude of +9.5. ==References== * (【引用サイトリンク】 work=SIMBAD Astronomical Database ) de:Castra 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 Capricorni」の詳細全文を読む スポンサード リンク
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