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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 Theta Sagittae ： ウィキペディア英語版 Theta Sagittae Theta Sagittae (Theta Sge, θ Sagittae, θ Sge) is a multiple star system in the constellation of Sagitta, with an apparent magnitude of +6.51. The primary component is a yellowish white F-type subgiant. It is approximately 147 light years from Earth. The star's age is estimated to be 1.9 billion years but is certainly no less than 1.5 billion years and no greater than 2.2 billion years.〔(Delta Sagittae (HIP 97365) )〕 Theta Sagittae is moving through the Galaxy at a speed of 49.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 18,500 and 25,900 light years from the center of the Galaxy.〔 Theta Sagittae will come closest to the Sun 777,000 years from now when it will brighten to magnitude 4.97 from a distance of 72 light 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「Theta Sagittae」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.