Study on Strategy and Efficiency of Dynamic Push Away from Orbit for Near-Earth Asteroids

Journal of Deep Space Exploration ›› 2023, Vol. 10 ›› Issue (4) : 413 -419.

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Journal of Deep Space Exploration ›› 2023, Vol. 10 ›› Issue (4) : 413 -419. DOI: 10.15982/j.issn.2096-9287.2023.20230100
Special Issue:Monitoring of and Desense Against Near-Earth Asteroids
Special Issue:Monitoring of and Desense Against Near-Earth Asteroids

Study on Strategy and Efficiency of Dynamic Push Away from Orbit for Near-Earth Asteroids

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Abstract

In view of the threat of more frequent near-Earth asteroid impacts,the asteroid dynamic push away deflection disposal mission was demonstrated. The disposal method was pushed away the asteroid multiple times by penetrating and anchoring the asteroid surface and by electric propulsion. In this paper,a dynamic model of near-Earth asteroids was established to study the change of orbit deviation of asteroids with different rotation states under the dynamic push away treatment strategy. Taking the deflection of 2019VL5 asteroid as an example,the efficiency of dynamic push away disposal and the feasibility of the project were evaluated by numerical simulation. The simulation results show that during the warning time of 4 years the maximum deflection distance of the asteroid could be 2.91 × 104 km under the small 0.4 N thrust applied to the specific orbital position,and the maximum deflection distance of the asteroid could be 9.0 × 104 km after 2 500 days of disposal. The dynamic push away disposal of asteroids can effectively deflect threatening asteroids,and can be used in future asteroids deflecting defense missions and orbit transfer missions against other space object attacks.

Keywords

near-Earth asteroids / planetary defense / dynamic push away / deflection disposal

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null. Study on Strategy and Efficiency of Dynamic Push Away from Orbit for Near-Earth Asteroids. Journal of Deep Space Exploration, 2023, 10(4): 413-419 DOI:10.15982/j.issn.2096-9287.2023.20230100

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