The Dynamics of the Trojan Asteroids
The Dynamics of the Trojan Asteroids
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DOI：
10.1007/978-94-011-1148-5_12
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发表时间：
1994
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影响因子：
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通讯作者：
A. Milani
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文献类型：
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作者：
A. Milani
特洛伊小行星动力学的最新技术进展迅速，因为已经可以对数百万年来的许多轨道进行数值积分。精确的真元现在是通过综合方法计算的，也就是从数值积分的输出中计算出来的;它们的稳定性，至少在几百万年的时间跨度内，是好的。这使得识别木马家族的自动程序密切模仿主带中使用的一个。虽然以可靠的方式确定的家庭只有四个，发生重大的碰撞演化，不像主带，可以确认。特洛伊云的动力学结构，包括主要长期共振的位置，可以推导出适当的元素和频率通过一个简单的拟合。然而，许多问题没有得到解决：一个显着比例的混沌轨道没有不稳定的迹象的起源;特洛伊云的稳定边界的位置;大多数特洛伊木马的高倾角的起源。我们也不知道除了木星之外的其他行星是否也有“特洛伊人”：只发现了一个火星特洛伊人。
The state of the art in the dynamics of the Trojan asteroids has progressed rapidly, since it has been possible to perform numerical integrations of many orbits for millions of years. Accurate proper elements are now computed by the synthetic method, that is from the output of a numerical integration; their stability, at least for time spans of a few million years, is good. This has allowed identification of Trojan families with an automated procedure closely mimicking the one used in the main belt. Although the families identified in a reliable way are only four, the occurrence of significant collisional evolution, not unlike that of the main belt, can be confirmed. The dynamical structure of the Trojan cloud, including the location of the main secular resonances, can be deduced from the proper elements and frequencies by a simple fit. However, many problems are not solved: the origin of a significant percentage of chaotic orbits showing no indications of instability; the location of the stability boundary of the Trojan cloud; the origin of the high inclination of most Trojans. We also do not know if there are “Trojans” for some other planets beside Jupiter: only one Mars Trojan has been found.