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木卫二十七

木卫二十七S/2000 J 7Praxidike/prækˈsɪdiki/prak-SID-ik-ee;希腊语:Πραξιδίκη),又名Jupiter XXVII木星的一颗逆行不规则卫星。由斯科特·谢泼德所领导的夏威夷大学研究小组于2000年发现。[1][2]

木卫二十七轨道平均半径为20,824 Mm,轨道周期为613.904地球日,与黄道间的轨道倾角为144°(与木星赤道143°),运转方向为逆行轨道离心率为0.1840。

它在2003年8月被命名为Praxidike英语Praxidike[3],是希腊神话中的惩罚女神。

它是阿南刻卫星群中的成员,据信是被俘虏的日心形小行星分裂的残余物。[4][5]估计直径为7公里,是阿南刻卫星群中继木卫十二后的第二大成员(假定反照率为0.04)。[6]

木卫二十七呈现灰色(色指数 B-V=0.77, R-V= 0.34),是典型的C-型小行星[7]

参考资料

  1. ^ IAUC 7555: Satellites of Jupiter页面存档备份,存于互联网档案馆) January 5, 2001 (discovery)
  2. ^ MPEC 2001-A29: S/2000 J 7, S/2000 J 8, S/2000 J 9, S/2000 J 10, S/2000 J 11页面存档备份,存于互联网档案馆) January 15, 2001 (discovery and ephemeris)
  3. ^ IAUC 7998: Satellites of Jupiter页面存档备份,存于互联网档案馆) 2002 October 22 (naming the moon)
  4. ^ Sheppard, S. S., Jewitt, D. C.; An Abundant Population of Small Irregular Satellites Around Jupiter页面存档备份,存于互联网档案馆), Nature, Vol. 423 (May 2003), pp. 261-263
  5. ^ Nesvorný, D.; Alvarellos, J. L. A.; Dones, L.; and Levison, H. F.英语Harold F. Levison; Orbital and Collisional Evolution of the Irregular Satellites页面存档备份,存于互联网档案馆), The Astronomical Journal, Vol. 126 (2003), pp. 398–429
  6. ^ Sheppard, S. S.; Jewitt, D. C.; Porco, C.; Jupiter's Outer Satellites and Trojans页面存档备份,存于互联网档案馆), 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
  7. ^ Grav, T.英语Tommy Grav; Holman, M. J.; Gladman, B. J.; Aksnes, K.英语Kaare Aksnes; Photometric Survey of the Irregular Satellites页面存档备份,存于互联网档案馆), Icarus, Vol. 166 (2003), pp. 33-45
  1. Ephemeris IAU-MPC NSES页面存档备份,存于互联网档案馆
  2. Mean orbital parameters NASA JPLArchive.is存档,存档日期2021-03-03

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木卫二十七
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