|
Pasiphae ( ;〔http://dictionary.reference.com/browse/pasiphae?r=75〕 (ギリシア語:''Πασιφάη''); formerly Pasiphaë)〔http://planetarynames.wr.usgs.gov/Page/Planets〕 is a retrograde irregular satellite of Jupiter. It was discovered in 1908 by Philibert Jacques Melotte and later named after the mythological Pasiphaë, wife of Minos and mother of the Minotaur from Greek legend. It was first spotted on a plate taken at the Royal Greenwich Observatory on the night of February 28, 1908. Inspection of previous plates found it as far back as January 27. It received the provisional designation , as it was not clear whether it was an asteroid or a moon of Jupiter. The recognition of the latter case came by April 10. Pasiphae did not receive its present name until 1975;〔(IAUC 2846: ''Satellites of Jupiter'' ) 1974 October 7 (naming the moon)〕 before then, it was simply known as . It was sometimes called "Poseidon" between 1955 and 1975. ==Orbit== Pasiphae orbits Jupiter on a high eccentricity and high inclination retrograde orbit. It gives its name to the Pasiphae group, irregular retrograde moons orbiting Jupiter at distances ranging between 22.8 and 24.1 million km, and with inclinations ranging between 144.5° and 158.3°.〔Sheppard, S. S.; Jewitt, D. C.; and Porco, C. C.; (''Jupiter's Outer Satellites and Trojans'' ), in ''Jupiter: The Planet, Satellites and Magnetosphere,'' edited by Fran Bagenal, Timothy E. Dowling, and William B. McKinnon, Cambridge Planetary Science, Vol. 1, Cambridge, UK: Cambridge University Press, ISBN 0-521-81808-7, 2004, pp. 263-280〕 The orbital elements are as of January 2000.〔 They are continuously changing due to solar and planetary perturbations. The diagram illustrates its orbit in relation to other retrograde irregular satellites of Jupiter. The eccentricity of selected orbits is represented by the yellow segments (extending from the pericentre to the apocentre). The outermost regular satellite Callisto is located for reference. Pasiphae is also known to be in a secular resonance with Jupiter (tying the longitude of its perijove with the longitude of perihelion of Jupiter). 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「Pasiphae (moon)」の詳細全文を読む スポンサード リンク
|