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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 Pyxidis ： ウィキペディア英語版 Theta Pyxidis Theta Pyxidis (Theta Pyx, θ Pyxidis, θ Pyx) is a red M-type giant in the constellation Pyxis. It is approximately 500 ± 30 light years from Earth.〔 It is of spectral type M1III and semi-regular variable with two measured periods of 13 and 98.3 days, and an average visual magnitude of 4.71,〔 It shines with a luminosity approximately 970 times that of the Sun and has a surface temperature of 3825 K. It has a diameter around 54 times that of the Sun. Theta Pyxidis is moving through the Galaxy at a speed of 22.8 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,200 and 24,700 light years from the center of the Galaxy. It came closest to the Sun 5.8 million years ago when it had brightened to magnitude 3.12 from a distance of 241 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 Pyxidis」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.