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Orbit inversion scenarios of minor bodies in retrograde orbit
Planetary and Space Science ( IF 2.4 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.pss.2020.105031
Paweł Kankiewicz

Abstract Small bodies of the Solar System in retrograde orbits, temporarily classified as asteroids, still do not have a consistent origin scenario. We currently know more than 100 objects in orbits similar to comets that have no confirmed activity so far. One of the concepts of their origin is the possibility of orbit inversion (flipping) in the past due to perturbations. In this study, it was decided to examine the efficiency of this mechanism from a statistical point of view. The main objective was to estimate the probability of orbit flipping. For this purpose, a Monte Carlo simulation of the motion of a swarm of objects with a distribution reflecting real observational errors was performed. It allowed to detect potential orbit inversions in the past and to assess the probability of these events quantitatively. It was also possible to find out the existence of factors that could have caused them, for example, by examining the statistics of close approaches and the presence of the strongest retrograde resonances. The asteroids that are most sensitive to orbit flipping have been identified, and special attention has been paid to these cases. There were also some objects found that are not at all prone to orbit inversion. In general, the overall scale of the flipping process is small. For 39 asteroids, most of which have a lifetime of less than 10 My in the past, only a small number could invert their orbits with a probability of more than a few percent. Although the cases of flipping found were interesting, they do not fully explain the mechanism of production of such orbits.

中文翻译:

逆行轨道小天体的轨道反转场景

摘要 处于逆行轨道的太阳系小天体,暂时归类为小行星,仍然没有一致的起源场景。目前,我们知道有 100 多个轨道上的物体类似于彗星,但到目前为止还没有确认的活动。它们起源的概念之一是过去由于扰动而发生轨道反转(翻转)的可能性。在这项研究中,决定从统计的角度检查这种机制的效率。主要目标是估计轨道翻转的概率。为此,对具有反映真实观测误差的分布的一组物体的运动进行了蒙特卡罗模拟。它允许检测过去潜在的轨道反转并定量评估这些事件的概率。也可以找出可能导致它们的因素的存在,例如,通过检查近距离接近的统计数据和最强逆行共振的存在。对轨道翻转最敏感的小行星已经确定,并且对这些情况给予了特别关注。还发现了一些根本不容易发生轨道反转的物体。一般来说,翻转过程的整体规模较小。对于39颗小行星,其中大部分在过去的寿命都小于10 My,只有少数小行星能够以百分之几以上的概率反转它们的轨道。虽然发现的翻转案例很有趣,但它们并不能完全解释这种轨道的产生机制。通过检查近距离接近的统计数据和最强逆行共振的存在。对轨道翻转最敏感的小行星已经确定,并且对这些情况给予了特别关注。还发现了一些根本不容易发生轨道反转的物体。一般来说,翻转过程的整体规模较小。对于39颗小行星,其中大部分在过去的寿命都小于10 My,只有少数小行星能够以百分之几以上的概率反转它们的轨道。虽然发现的翻转案例很有趣,但它们并不能完全解释这种轨道的产生机制。通过检查近距离接近的统计数据和最强逆行共振的存在。对轨道翻转最敏感的小行星已经确定,并且对这些情况给予了特别关注。还发现了一些根本不容易发生轨道反转的物体。一般来说,翻转过程的整体规模较小。对于39颗小行星,其中大部分在过去的寿命都小于10 My,只有少数小行星能够以百分之几以上的概率反转它们的轨道。虽然发现的翻转案例很有趣,但它们并不能完全解释这种轨道的产生机制。并特别关注这些案件。还发现了一些根本不容易发生轨道反转的物体。一般来说,翻转过程的整体规模较小。对于39颗小行星,其中大部分在过去的寿命都小于10 My,只有少数小行星能够以百分之几以上的概率反转它们的轨道。虽然发现的翻转案例很有趣,但它们并不能完全解释这种轨道的产生机制。并特别关注这些案件。还发现了一些根本不容易发生轨道反转的物体。一般来说,翻转过程的整体规模较小。对于39颗小行星,其中大部分在过去的寿命都小于10 My,只有少数小行星能够以百分之几以上的概率反转轨道。虽然发现的翻转案例很有趣,但它们并不能完全解释这种轨道的产生机制。
更新日期:2020-10-01
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