Detection of a Trailing (L5) Neptune Trojan
Detection of a Trailing (L5) Neptune Trojan
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DOI：
10.1126/science.1189666
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发表时间：
2010-09
期刊：
影响因子：
56.9
通讯作者：
S. Sheppard;C. Trujillo
中科院分区：
文献类型：
--
作者：
S. Sheppard;C. Trujillo
一颗小行星在重力稳定区域中沿着海王星的轨道运行。太阳系小天体的轨道记录了太阳系的历史。在这里，我们报告了对 2008 LC18 的探测，它是海王星轨道内引力平衡尾随 (L5) 拉格朗日区域的海王星特洛伊木马。我们估计，前海王星特洛伊区域和尾随海王星特洛伊区域具有相似的人口规模和动态，这两个区域都以高倾斜度物体为主。海王星拉格朗日区域的相似种群和动态表明，特洛伊木马很可能是被迁移的、偏心的海王星在动态激发的星子种群中捕获的。
An asteroid follows the orbit of the planet Neptune in a region of gravitational stability. The orbits of small Solar System bodies record the history of our Solar System. Here, we report the detection of 2008 LC18, which is a Neptune Trojan in the trailing (L5) Lagrangian region of gravitational equilibrium within Neptune’s orbit. We estimate that the leading and trailing Neptune Trojan regions have similarly sized populations and dynamics, with both regions dominated by high-inclination objects. Similar populations and dynamics at both Neptune Lagrangian regions indicate that the Trojans were likely captured by a migrating, eccentric Neptune in a dynamically excited planetesimal population.