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Orbital Stability Regions for Hypothetical Natural Satellites of (101955) Bennu

机译:(101955)本努假想天然卫星的轨道稳定区

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摘要

The Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer (known as OSIRIS-REx) mission will orbit and return a sample from near-Earth asteroid (101955) Bennu. Ground-based observations determined that no object greater than 15m in diameter is orbiting around Bennu. This investigation explores the potential size and stability of natural satellites of less than 15m in diameter to provide predictions for where such small satellites should be searched for upon arrival. The focus is solely on the existence of stable orbits for natural satellites. How the natural satellite migrated to this orbit is purposefully placed outside the bounds of this study. The numerical model includes J2 of Bennu, third-body dynamics from the sun, and solar radiation pressure. This model is used with the initial conditions of various semimajor axes, inclinations, the longitude of the ascending nodes, and natural satellite diameters. To be stable, it is required that a set of initial conditions must remain in orbit for greater than 1000 years. The possible existence of natural satellites in orbit around Bennu as small as 0.75cm is found. Certain mechanisms such as the modified Laplace plane, the Kozai resonance, and sun-synchronous orbits help explain the stability of some orbits.
机译:起源,光谱解释,资源识别,安全性-Regolith Explorer(称为OSIRIS-REx)任务将绕轨道运行,并从近地小行星(101955)Bennu返回一个样本。地面观测表明,没有直径大于15m的物体绕本努绕行。这项研究探索了直径小于15m的天然卫星的潜在大小和稳定性,从而为到达后应在何处搜寻此类小型卫星提供了预测。重点仅在于天然卫星的稳定轨道的存在。自然卫星如何迁移到该轨道被故意置于本研究的范围之外。数值模型包括Bennu的J2,来自太阳的第三体动力学以及太阳辐射压力。该模型用于各种半长轴,倾斜度,上升节点的经度和自然卫星直径的初始条件。为了保持稳定,要求一组初始条件必须在轨道上保持1000年以上。发现在本努周围只有0.75厘米的轨道上存在天然卫星。某些机制(如修改的拉普拉斯飞机,科扎伊共振和太阳同步轨道)有助于解释某些轨道的稳定性。

著录项

  • 来源
    《Journal of Spacecraft and Rockets》 |2019年第3期|789-800|共12页
  • 作者单位

    Univ Colorado, Dept Aerosp Engn Sci, 431 UCB, Boulder, CO 80303 USA;

    Univ Colorado, Dept Aerosp Engn Sci, 429 UCB, Boulder, CO 80309 USA;

    NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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