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arXiv · 1108.3183

Utilization of H-reversal Trajectory of Solar Sail for Asteroid Deflection

Shengping Gong·Junfeng Li·Xiangyuan Zeng
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Abstract

Near Earth Asteroids have a possibility of impacting with the Earth and always have a thread on the Earth. This paper proposes a way of changing the trajectory of the asteroid to avoid the impaction. Solar sail evolving in a H-reversal trajectory is utilized for asteroid deflection. Firstly, the dynamics of solar sail and the characteristics of the H-reversal trajectory are analyzed. Then, the attitude of the solar sail is optimized to guide the sail to impact with the object asteroid along a H-reversal trajectory. The impact velocity depends on two important parameters: the minimum solar distance along the trajectory and lightness number. A larger lightness number and a smaller solar distance lead to a higher impact velocity. Finally, the deflection capability of a solar sail impacting with the asteroid along the H-reversal is discussed. The results show that a 10 kg solar sail with a lead-time of one year can move Apophis out of a 600-m keyhole area in 2029 to eliminate the possibility of its resonant return in 2036.

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Shengping Gong, Junfeng Li, Xiangyuan Zeng. 2011-08-16. Utilization of H-reversal Trajectory of Solar Sail for Asteroid Deflection. https://doi.org/10.1088/1674-4527/11/10/001

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