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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 R Geminorum ： ウィキペディア英語版 R Geminorum R Geminorium (R Gem) is a Mira variable and technetium star in the constellation Gemini. When at maximum light its apparent visual magnitude usually is between 6 and 7, while at minimum light it is typically near magnitude 14.〔(【引用サイトリンク】title=Light Curve Generator )〕 It is located approximately away. It is one of the brightest known examples of an S-type star, a type that is similar to M-type star, but whose spectra shows zirconium oxide, yttrium oxide and technetium. These exotic elements are formed in the star's core. Technetium has a half-life of just 4.2 million years, so it must have been brought up from the core relatively recently. R Gem has an unusual amount of it, even for an S-type star.〔 == 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「R Geminorum」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.