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木卫二十四

木卫二十四
Iocaste
发现
发现者斯科特·谢泼德
发现日期2000年11月23日[1]
编号
其它名称Jupiter XXIV
轨道参数
近心点16,696,393 km (0.111 608 AU)
远心点25,847,607 km (0.172 780 AU)
二次轨道半径21,272,000 km(0.142 194 天文单位
离心率0.2874
隶属天体木星
物理特征
平均半径2.6 km
表面积84.95 km2 (0.082 Earths)
体积74 km3 (6.8×10-11 Earths)
质量1.9483×1014 千克 (3.26×10-11 Earths)
平均密度2.6 /cm3
表面重力0.002 加速度 (0.0002 G力)
11  km/h[1]

木卫二十四伊俄卡斯忒(S/2000 J 3Iocaste/ˈkæst/eye-o-KAS-tee;希腊语:Ιοκάστη),又名Jupiter XXIV,是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。[2][3]

其轨道平均半径为20,723 Mm,轨道周期为609.427地球日,与黄道间的轨道倾角为147°(与木星赤道146°),运转方向为逆行轨道离心率为0.2874。

它在2002年10月被命名为Iocaste(伊俄卡斯忒[4],是希腊神话俄狄浦斯的母亲兼妻子。

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。[5][6]

其直径约为5公里[7],颜色为灰色(色指数 B−V=0.63, R−V=0.36),与C-型小行星相似。[8]

参考资料

  1. ^ 1.0 1.1 Iocaste: By the Numbers. NASA. [2015-03-29]. (原始内容存档于2016年4月12日). 
  2. ^ Daniel W. E. Green. Satellites of Jupiter. International Astronomical Union Central Bureau for Astronomical Telegrams. 2001-01-05 [2018-04-28]. (原始内容存档于2002-09-16). 
  3. ^ Brian G. Marsden. S/2000 J 2, S/2000 J 3, S/2000 J 4, S/2000 J 5, S/2000 J 6. International Astronomical Union Minor Planet Center. 2001-01-05 [2018-04-28]. (原始内容存档于2017-08-12). 
  4. ^ Daniel W. E. Green. Comet P/2002 T5 (Linear). International Astronomical Union Central Bureau for Astronomical Telegrams. 2002-10-22 [2018-04-28]. (原始内容存档于2017-08-12). 
  5. ^ Sheppard, S. S.; Jewitt, D. C.; "An Abundant Population of Small Irregular Satellites Around Jupiter" 互联网档案馆存档,存档日期2006-08-13., Nature, Vol. 423 (May 2003), pp. 261–263
  6. ^ 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", The Astronomical Journal, Vol. 126 (2003), pp. 398–429
  7. ^ Sheppard, S. S.; Jewitt, D. C.; Porco, C. C.; "Jupiter's Outer Satellites and Trojans" 互联网档案馆存档,存档日期2007-06-14., 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
  8. ^ Grav, T.英语Tommy Grav; Holman, M. J.; Gladman, B. J.; and 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

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