Study on observation simulation for space-based potentially hazardous asteroids warning mission on Earth trailing heliocentric orbit

Xin-tao WANG; Ming-tao LI

doi:10.37188/OPE.20202811.2563

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Study on observation simulation for space-based potentially hazardous asteroids warning mission on Earth trailing heliocentric orbit

Monitoring and Early Warning of NEOs | 更新时间：2020-12-09

- Study on observation simulation for space-based potentially hazardous asteroids warning mission on Earth trailing heliocentric orbit
- Optics and Precision Engineering Vol. 28, Issue 11, Pages: 2563-2571(2020)
- 作者机构：
  
  1.中国科学院国家空间科学中心, 北京 101499
  2.中国科学院大学, 北京 100049
- 作者简介：
- 基金信息：
- DOI：10.37188/OPE.20202811.2563
  CLC： P185.7
- Received：02 April 2020，
  
  Revised：12 May 2020，
  
  Accepted：12 May 2020，
  
  Published：25 November 2020
- 稿件说明：
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Xin-tao WANG, Ming-tao LI. Study on observation simulation for space-based potentially hazardous asteroids warning mission on Earth trailing heliocentric orbit[J]. Optics and precision engineering, 2020, 28(11): 2563-2571.
DOI：

Xin-tao WANG, Ming-tao LI. Study on observation simulation for space-based potentially hazardous asteroids warning mission on Earth trailing heliocentric orbit[J]. Optics and precision engineering, 2020, 28(11): 2563-2571. DOI： 10.37188/OPE.20202811.2563.

摘要

小行星监测预警是开展行星防御的前提，针对地基望远镜无法监测来自太阳方向小行星的问题，本文论证了地球公转轨道天基光学望远镜任务概念。考虑地球第三体引力摄动，建立了望远镜轨道维持模型；考虑小行星视星等约束和望远镜视场约束，建立望远镜对小行星的可见性模型，评估了地球公转轨道光学望远镜的观测和预警效能。仿真结果表明：施加约580 m/s的速度增量可使望远镜6年内的漂移距离相对初始状态不超过6%；对构建的危地小行星数据库，在极限视星等为24的条件下，地球公转轨道光学望远镜在6年内可观测84.5%直径超过140 m的危地小行星，能够对来自太阳方向的危地小行星进行有效预警。地球公转轨道望远镜对危地小行星具有较好的观测预警效能。

Abstract

Monitoring and early warning of asteroids are the premise of planetary defense. To monitor and provide early warning of asteroids from the Sun direction

an Earth trailing heliocentric orbiting optical telescope mission was proposed. Furthermore

considering the third-body gravitational perturbation of the Earth

an orbit maintenance model was established for the telescope. Considering apparent visual magnitude constraints of asteroids and field of view constraints of the telescope

an observation model for potentially hazardous asteroids was established. The observation and early warning efficiency of the telescope were evaluated. Simulation results showed that with delta-v of approximately 580 m/s

the orbit drift distance of the telescope did not exceed the initial state by 6% within 6 years. The telescope

under the condition of limited apparent visual magnitude of 24

could observe 84.5% of potentially hazardous asteroids with a diameter of more than 140 m. It could also provide effective early warning for potentially hazardous asteroids from the Sun direction. Thus

the optical telescope on an Earth trailing heliocentric orbit exhibited good observation and early warning performance.

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references

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