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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 Zeta Ursae Minoris ： ウィキペディア英語版 Zeta Ursae Minoris Zeta Ursae Minoris (ζ UMi, ζ Ursae Minoris) is a star in the constellation Ursa Minor. It has the traditional name Akhfa al Farkadain,〔(Arabic Star Names )〕 from the Arabic أخفى الفرقدين ''aḫfa al-farqadayn'' "the dimmer of the two calves", as opposed to Anwar al Farkadain (η UMi) "the brighter of the two calves". These names were originally applied to Pherkad and Kochab, respectively, the other two stars in the rectangle of Ursa Minor. Zeta Ursae Minoris is a white stellar class A-type main sequence star with an apparent magnitude of +4.28. It is approximately 380 light years from Earth. Despite its classification as a main sequence dwarf star, Zeta UMi is 3.4 times the mass of the sun and its luminosity is about 200 solar luminosities. At a surface temperature of 8,700 kelvins, this star is actually on the verge of becoming a giant star. Zeta UMi may also be a variable of the Delta Scuti type. ==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「Zeta Ursae Minoris」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.