Numerical Ephemeris

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

Database of celestial body positions derived from high-precision numerical integration, providing positions via lookup and interpolation. A representative example is the JPL DE series ephemeris. Its accuracy far exceeds analytical ephemerides but requires more storage. For libration point orbit prediction, the positions of the Sun and Moon must use numerical ephemerides to ensure accuracy.

Application Value

The Numerical Ephemeris plays a significant role in cislunar space mission design, analysis, and control. In orbital design, it can be leveraged for transfer trajectory optimization; in navigation and control, it improves mission execution precision and reliability; in system analysis, it facilitates deeper understanding of complex multi-body dynamical behavior, guiding mission planning and risk assessment.

References

  • 邓辉 等 - 2017 - 地月系共线平动点探测器的星上轨道预报问题
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Contributors: ouyangjiahong, Ou Yang Jiahong