Lunar Eccentricity Perturbation
Author: Tianjiang Shuo
Website: https://cislunarspace.cn
Definition
The periodic perturbation caused by the Moon's orbital eccentricity (about 0.0549) on orbits near the Earth-Moon libration points. As the Moon moves between perigee and apogee, the gravitational field at the libration point varies with the lunar orbital phase over a period of about 27.3 days. This perturbation is a primary reason why Earth-Moon libration point orbit stationkeeping is more challenging than in the Sun-Earth system. Accurate assessment requires modeling over at least 21 days to capture one full lunar orbital period.
Application Value
Based on its definition, the periodic perturbation caused by the moon's orbital eccentricity (about 0.0549) on orbits near the earth-moon libration points. as the moon moves between perigee and apogee, the gravitational field.
Related Concepts
- 三体问题（Three-Body Problem）
- 最优控制（Optimal Control）
- 轨迹优化（Trajectory Optimization）
References
- Folta et al. 2010