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Sinope ( ;〔http://dictionary.reference.com/browse/Sinope〕 (ギリシア語:''Σινώπη'')) is a retrograde irregular satellite of Jupiter discovered by Seth Barnes Nicholson at Lick Observatory in 1914,〔 〕 and is named after Sinope of Greek mythology. Sinope did not receive its present name until 1975;〔 (in which he declines to name the recently discovered satellites (pp. 93–94))〕〔(IAUC 2846: ''Satellites of Jupiter'' ) 1974 October (naming the moon)〕 before then, it was simply known as . It was sometimes called "Hades" between 1955 and 1975. Sinope was the outermost known moon of Jupiter until the discovery of Megaclite in 2000. The most distant moon of Jupiter now known is . ==Orbit== Sinope orbits Jupiter on a high eccentricity and high inclination retrograde orbit. The orbital elements are as of January 2000.〔 They are continuously changing due to solar and planetary perturbations. It is often believed to belong to the Pasiphae group.〔Sheppard, S. S.; and Jewitt, D. C.; (''An Abundant Population of Small Irregular Satellites Around Jupiter'' ), Nature, Vol. 423 (May 2003), pp. 261-263〕 However, given its mean inclination and different colour, Sinope could be also an independent object, captured independently, unrelated to the collision and break-up at the origin of the group.〔Grav, T.; Holman, M. J.; Gladman, B. J.; and Aksnes, K.; (''Photometric Survey of the Irregular Satellites'' ), Icarus, Vol. 166 (2003), pp. 33-45〕 The diagram illustrates Sinope's orbital elements in relation to other satellites of the group. Sinope is also known to be in a secular resonance with Jupiter, similar to Pasiphae. However, Sinope can drop out of this resonance and has periods of both resonant and non resonant behaviour in time scales of 107 years. 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「Sinope (moon)」の詳細全文を読む スポンサード リンク
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