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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 Delta Equulei ： ウィキペディア英語版 Delta Equulei Delta Equulei is the second brightest star in the constellation Equuleus. Delta Equulei is a binary star system about 60 light years away,〔 with components of class G0 and F5.〔(【引用サイトリンク】University of Illinois Astronomy department ">url=http://www.astro.uiuc.edu/~kaler/sow/deltaequ.html )〕 Their combined magnitude is 4.47, and their absolute magnitude is 3.142. There is controversy as to the exact masses of the stars. One study puts the larger at 1.22 solar masses and the smaller at 1.17, while another pegs them at 1.66 and 1.593.〔 The luminosity of the larger star is calculated to be 2.23 solar, and the smaller to be 2.17.〔 ==System== William Herschel listed Delta Equulei as a wide binary. Friedrich Georg Wilhelm von Struve later showed this to be an unrelated optical double star. However his son Otto Wilhelm von Struve while making follow-up observations in 1852 found that while the separation of the optical double continued to increase, Delta Equulei itself appeared elongated. He concluded that it is a much more compact binary.〔 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「Delta Equulei」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.