Permanent Capture

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

The physical state in which a spacecraft's Jacobi constant drops below the critical value at L1, confining its motion to the vicinity of the Moon. In the PCR3BP, this is a strict condition: once met, the spacecraft cannot leave the lunar region without thrust.

Application Value

The Permanent Capture 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.

  • J2-Invariant Orbit
  • Interior Point Optimization
  • N-Body Dynamics
  • Start-End State Constraint

References

  • Oshima et al. 2017
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Contributors: ouyangjiahong, Ou Yang Jiahong