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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 Alpha Piscium ： ウィキペディア英語版 Alpha Piscium Alpha Piscium (Alpha Psc, α Piscium, α Psc) is the Bayer designation for a star in the equatorial constellation of Pisces. It has the traditional name Alrescha (Al Rescha, Alrischa, Alrisha). The distance to α Psc is about 139 light years. The system comprises a close double star with angular separation of presently 1.8" between the components. The main star is of magnitude +4.33 and spectral type A0p, while the companion is magnitude 5.23 and belongs to spectral class A3m. The two stars take more than 700 years to orbit one another and they will make their closest approach to each other around 2060. One or both of the stars may be a spectroscopic binary as well. The stars have masses of 2.3 and 1.8 solar masses respectively and shine with a total luminosity of 31 and 12 times that of the Sun.〔 ==Name and etymology== *The name ''Alrescha'' is from the Arabic الرشآء ''al-rišā’'' "the well rope". Less common names are ''Kaitain'' and ''Okda'', the latter from the Arabic عقدة ''‘uqdah'' "knot".〔 *In Chinese, (), meaning ''Outer Fence'', refers to an asterism consisting of α Piscium, δ Piscium, ε Piscium, ζ Piscium, μ Piscium, ν Piscium and ξ Piscium. Consequently, α Piscium itself is known as (, (英語:the Seventh Star of Outer Fence).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日 )〕 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 Piscium」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.