Journal of Space Science and Experiment >

2023 , Vol. 23 >Issue 3: 1 - 18

DOI: https://doi.org/10.19963/j.cnki.2096-4099.2023.03.001

Planetary Defense

Analysis of the “Double Asteroid Redirection Test”Mission and Overall Design of Asteroid Defense Mission

  • ZHANG Hai-bo ,
  • CHEN Yang ,
  • GUO Cong ,
  • CHENG Shi ,
  • ZHU Ji-cong
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  • 1. Departmentof CASIC Space Engineering, Beijing 100854, China;
    2. Beijing Institute of Technology, Beijing 100081, China

Online published: 2024-02-01

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Abstract

On 27 September 2022 CST, the Double Asteroid Redirection Test (DART) Mission implemented a kinetic impact into asteroid named Dimorphos, the secondary star in the Didymos binary asteroid system, at a speed of about 6.2 km/s, which shortened the substar’s orbital period by 32 minutes. The DARTmission realized the first in-orbit demonstration of Near Earth Asteroid Deflection. It verified the key technologies of practical asteroid defense such as high-precision guidance and control technology for high-speed impact in deep space, numerical simulation and evaluation of the deflection effect, and proved the feasibility of kinetic impact for asteroid deflection. This mission is a milestone for mankind to proactively deal with the threat of asteroid in the future.In this paper, the DART’s target selection principle, mission design, guidance and control technology, deflection evaluation method and other aspects are analyzed. On this basis, the overall design of two forms of asteroid disposal mission is proposed, and the mission orbit, ground observability and deflection effect are analyzed.

Key words： Double Asteroid Redirection Test (DART) mission; asteroid defense; kinetic impact; guidance and control technology; deflection assessment

Cite this article

ZHANG Hai-bo , CHEN Yang , GUO Cong , CHENG Shi , ZHU Ji-cong . Analysis of the “Double Asteroid Redirection Test”Mission and Overall Design of Asteroid Defense Mission[J]. Journal of Space Science and Experiment, 2023 , 23(3) : 1 -18 . DOI: 10.19963/j.cnki.2096-4099.2023.03.001

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