Non-Spherical Gravity

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

Non-central gravitational force due to uneven mass distribution of celestial bodies, described by spherical harmonic coefficients of the gravitational potential. Earth uses EGM2008 model and Moon uses LP165P model, both at 50×50 order/degree.

Application Value

This concept is essential for understanding motion characteristics in orbital design and control, and plays a vital role in mission success.

  • Minimum Norm Solution
  • Rigid Body Dynamics
  • Variable-Size Design Space, VSDS
  • Analytical Gradient

References

  • Chen 等 - 2026
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Contributors: ouyangjiahong, Ou Yang Jiahong