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10199 Chariklo ( or ; ; provisional designation: ) is the largest confirmed centaur (minor planet of the outer Solar System). It orbits the Sun between Saturn and Uranus, grazing the orbit of Uranus. On 26 March 2014, astronomers announced the discovery of two rings (nicknamed Oiapoque and Chuí),〔 around Chariklo by observing a stellar occultation.〔〔 making it the first known minor planet to have rings.〔 Chariklo was discovered by James V. Scotti of the Spacewatch program on February 15, 1997. Chariklo is named after the nymph Chariclo ('), the wife of Chiron and the daughter of Apollo. A photometric study in 2001 was unable to find a definite period of rotation.〔 Infrared observations of Chariklo indicate the presence of water ice,〔 which may in fact be located in its rings.〔 Michael Brown's website lists it as possibly a dwarf planet with a measured diameter of 232 km.〔 == Size == Chariklo is currently the largest known centaur, with an estimated diameter of about .〔 2060 Chiron is likely to be the second largest with 220 km.〔 The lost centaur may even be larger, with an estimated diameter close to 300 km.〔 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「10199 Chariklo」の詳細全文を読む スポンサード リンク
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