小行星双星系统是当前国际小天体探测的主要目标之一，关于其形成和演化的学说是行星学科界近二十年来持续关注的热门话题，对于未来的太阳系研究和深空探测任务，具有深刻的科学价值和社会意义。随着观测手段的进步和计算条件的完善，太阳系双星系统构型演化的动力学正成为新的研究热点，有大量原创性工作可以进行。本项目拟从双星系统精确动力学模型的表征方法出发，建立任意双星体之间的引力场表征理论和包含空间摄动因素的精确力学模型；针对目前双星结构演化动力学涉及的两大核心科学问题（即双星的形成过程与构型稳定性），综合采用理论分析和数值计算方法，并结合原理实验的数据结果，研究揭示现有双星系统形成机制和稳定构型之间在原理上的相容性，阐释系统从形成到稳定构型的可能演化途径和演化边界。为相关国际大科学工程提供原创性的理论方法和原理发现，同时服务于我国未来深空探测的重大战略需求，促进我国行星科学的研究进展和面向公众的传播普及。

Binary minor planets (BMPs) are remarked as the major targets of current space missions to explore the Solar System small bodies. The theories on their origins and future evolution have been one of the central topics in the filed of planetary science for over 20 years. The binary minor planets hence bear both important intellectual and social merits for future solar system studies and human’s space exploration. As the progressing of observation and computing technologies, the dynamics of BMPs configurations has become a new research hotspot, which is still a young and immature field and calls for more original contributions. This proposal suggests to study accurate representation of the BMPs mechanical environment as the breakthrough. We will first develop an analytical form of the gravity between arbitrary binary bodies, then build up an informative numeric model for specified binary system. As for the two core scientific problems in the configuration dynamics, i.e., the binary formation and stable configuration, we will study and reveal the compatibility between the formation mechanism and stable orbit & orientation, and further discuss the evolutional path from the early formation to the stable configuration of BMPs. Theoretical tools and numeric methodologies will both be employed in this research, and principle experiments will also be performed to obtain crucial parameters. This work is expected to contribute original creativities and findings to the relevant international scientific missions, and as well to serve China’s strategic demands in future deep space exploration. The research proposed here will certainly promote progresses of the planetary science and its popularization to the public.