小行星探测最优两脉冲交会轨道设计与分析

小行星探测已经成为新世纪深空探测的一个新热点和未来世界航天发展的一个新方向。转移轨道的设计和探测目标可接近性的分析是小行星探测的关键技术之一。现利用了任意两个非共面非共轴椭圆轨道之间的最优两脉冲转移方法，对我国提出的探测Ivar小行星的交会转移轨道进行了设计与分析，给出了全局最优两脉冲交会轨道的设计参数，并利用此方法对近地小行星的可接近性进行了分析和排序，给出了可接近性较好的40颗近地小行星的转移轨道设计参数。这些研究结果对于近地小行星探测任务的目标选择和发射机会的预测都有重要的参考价值。

Design and Analyze Optimum Two-Impulse Transfer Trajectory for Exploring Asteroids

Asteroid exploration has been a new hot spot of deep space explorations in new century and a new orientation of space flight development of the world in the future. The design of transfer trajectory and the accessibility analysis of exploring targets are the one of significant technologies for the asteroid exploration. In this paper, the transfer trajectory for rendezvous with Ivar Asteroid was designed and analyzed by using the method of optimum two-impulse orbital transfers between any two inclined noncoapsidal elliptical orbits. We presented the orbital parameters of the global optimum two-impulse rendezvous trajectory for exploring Ivar Asteroid. Then the ranking and analysis about accessibility of Near-Earth Asteroids was presented by using this method. We provided the design parameters of transfer trajectory of 40 Near Earth Asteroids that have better accessibility. These results are of high value for selecting target and predicting the launch opportunity of exploring asteroid missions.