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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 NGC 2423-3 ： ウィキペディア英語版 NGC 2423-3 NGC 2423-3 is a red giant star approximately 2498 light-years away in the constellation of Puppis. The star is part of the NGC 2423 open cluster (hence the name ''NGC 2423-3''). The star has an apparent magnitude of nine and an absolute magnitude of zero, with a mass of 2.4 times the Sun. As of 2007, it has been confirmed that an extrasolar planet orbits the star. == Planetary system == NGC 2423-3 b is an exoplanet〔 10.6 times more massive than Jupiter, even more massive than Pi Mensae b, which has mass about 10.3 times Jupiter. Only the minimum mass is known since the orbital inclination is not known, so it is likely to be a brown dwarf instead, like NGC 4349-127 b. The planet orbits at 10.2 μpc, taking 1.956 years to orbit eccentrically around the star. Its eccentricity is about the same as Mercury, but less than Pluto. The planet has semi-amplitude of 71.5 m/s since if 10.6 MJ planet orbits at 2.1 AU from 2.4 MS star. This planet was discovered by Chad Lovis and Michel Mayor in July 2007. Lovis had also found three Neptune-mass planets orbiting HD 69830 in May 2006, also in Puppis. 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「NGC 2423-3」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.