| 地月DRO星载光学测量近地小行星轨道确定 |
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| 引用本文： | 刘佳,宋叶志,黄乘利,胡小工,谭龙玉.地月DRO星载光学测量近地小行星轨道确定[J].天文学报,2023,64(6):66-100. |
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| 作者姓名： | 刘佳 宋叶志 黄乘利 胡小工 谭龙玉 |
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| 作者单位： | 中国科学院上海天文台 上海 200030;上海科技大学物质科学与技术学院 上海 201210;中国科学院大学天文与空间科学学院 北京 100049;上海航天控制技术研究所 上海 201109 |
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| 基金项目： | 上海天文台重点培育项目(N20210601003)、民用航天``十四五''技术预先研究项目(KJSP2020020203)资助 |
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| 摘 要： | 针对地基光学监测系统对近地小行星在近太阳方向的监测存在盲区的问题,提出了远距离逆行轨道(Distant Retrograde Orbit,DRO)天基光学平台对近地小行星进行跟踪定轨的方法.通过可视性分析,筛选仿真观测数据,利用美国宇航局喷气推进实验室(Jet Propulsion Laboratory,JPL)公布的小行星初始轨道信息对不同轨道类型的目标天体进行轨道确定,将计算结果与参考轨道对比分析.仿真结果表明:在测量精度2角秒,定轨弧长3年的情况下,DRO平台对仿真算例中所选择的近地小行星的定轨精度可以达到几十公里量级,其中Atira型轨道精度可达10公里以内.由此可见,DRO天基平台对近地小行星具有较好的监测能力,定轨精度能实现对目标小行星的精确跟踪,并对其进行轨道预报.
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| 关 键 词： | 小行星:近地小行星 航天器:DRO卫星 天体力学:轨道确定 方法:天基光学监测 数值 |
| 收稿时间： | 2022/9/27 0:00:00 |
Near-Earth Asteroids Orbit Determination by DRO Space-Based Optical Observations |
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| LIU Ji,SONG Ye-zhi,HUANG Cheng-li,HU Xiao-gong,TAN Long-yu.Near-Earth Asteroids Orbit Determination by DRO Space-Based Optical Observations[J].Acta Astronomica Sinica,2023,64(6):66-100. |
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| Authors: | LIU Ji SONG Ye-zhi HUANG Cheng-li HU Xiao-gong TAN Long-yu |
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| Institution: | Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030;School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210;School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing 100049; Shanghai Aerospace Control Technology Institute, Shanghai 201109 |
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| Abstract: | In response to the problem that ground-based optical monitoring systems cannot monitor near-Earth asteroids which are too close to the Sun on the celestial sphere, we raise a method that tracks and determines the orbit of asteroids by Distant Retrograde Orbit (DRO) platforms with optical monitoring. Through data filtering by visibility analysis and the initial orbit information of the asteroids provided by Jet Propulsion Laboratory (JPL), the asteroids'' orbits are determined and compared with the reference orbit. Simulation results show that with a measurement accuracy of two arcseconds and an arc length of three years, the orbit determination accuracy of the DRO platform for near-Earth asteroids selected in the simulation example can reach tens of kilometers, especially the asteroids with Atira orbits to an accuracy of fewer than ten kilometers. In conclusion, the near-Earth asteroids monitoring systems based on DRO platforms are capable to provide sufficient monitoring effectiveness which enables precise tracking of the target asteroids and forecast of their positions. |
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| Keywords: | minor planets asteroids: near-Earth asteroids spacecraft: distant retrograde orbit (DRO) satellite celestial mechanics: orbit determination methods: space-based optical monitoring numerical |
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