A Rendezvous Mission to the Second Earth Trojan Asteroid 2020 XL_5 with Low-Thrust Multi-Gravity Assist Techniques  

作　　者：Shi-Hai Yang Bo Xu Xin Li 

机构地区：[1]School of Aeronautics and Astronautics,Sun Yat-sen University,Shenzhen 518107,China

出　　处：《Research in Astronomy and Astrophysics》2024年第1期245-264,共20页天文和天体物理学研究（英文版）

基　　金：supported by Basic Research Project of China(grant No:JCKY2020110C096);the National Key R&D Program of China (grant No:2020YFC2201202)。

摘　　要：As the second of Earth's Trojan asteroids, 2020 XL_(5) is worthy of rendezvous and even sample return missions in many aspects. In this paper, a rendezvous mission to Earth's second Trojan asteroid 2020 XL_(5) is proposed.However, due to its high inclination and large eccentricity, direct impulsive transfer requires large amounts of fuel consumption. To address this challenge, we explore the benefits of electric propulsion and multi-gravity assist techniques for interplanetary missions. These two techniques are integrated in this mission design. The design of a low-thrust gravity-assist(LTGA) trajectory in multi-body dynamics is thoroughly investigated,which is a complex process. A comprehensive framework including three steps is presented here for optimization of LTGA trajectories in multi-body dynamics. The rendezvous mission to 2020 XL_(5) is designed with this three-step approach. The most effective transfer sequence among the outcomes involves Earth–Venus–Earth–Venus-2020 XL_(5). Numerical results indicate that the combination of electric propulsion and multi-gravity assists can greatly reduce the fuel consumption, with fuel consumption of 9.03%, making it a highly favorable choice for this rendezvous mission.

关 键 词：minor planets asteroids:general celestial mechanics Planetary Systems 

分 类 号：P185.7[天文地球—天文学] V19[航空宇航科学与技术—人机与环境工程]