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Kepler-223 (KOI-730, KIC #10227020) is a G5V star with an extrasolar planetary system discovered by the Kepler mission. Preliminary studies indicate that the KOI-730 star system consists of 4 planets orbiting the star.〔 〕 ==Unconfirmed planetary system== An as-yet unconfirmed planetary system has been detected by the Kepler mission, containing four planet candidates. This system was initially believed to contain two co-orbital planets orbiting the star at approximately the same orbital distance every 9.8 days, with one permanently locked 60° behind the other in one of the two Trojan Lagrangian points. The two co-orbital planets were thought to be locked in mean motion resonances with the other two planets, creating an overall 6:4:4:3 resonance. This would have been the first known example of co-orbital planets. However follow-up study of the system revealed that an alternative configuration, with the four planets having orbital periods in the ratio 8:6:4:3 is better supported by the data. This configuration does not contain co-orbital planets. Fabrycky et al. give the radii as 1.8, 2.1, 2.8, and 2.4 Earth radii with orbital periods of 7.4, 9.8, 14.8, and 19.7 days, respectively.〔Sigurðsson, Steinn (12 September 2011) (Dynamics of Cats. ExSSII: more transits ). scienceblogs.com〕〔Extrasolar Planets Encyclopaedia, (KOI-730 )〕 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「Kepler-223」の詳細全文を読む スポンサード リンク
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