Collision Curve

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

In the resonance phase plane (e.g., the e-σ plane), the curve along which the distance between the spacecraft and Moon equals zero. The collision curve marks the boundary of physically inaccessible regions; periodic resonant orbits must lie outside this curve. It serves as an important geometric reference for analyzing the structure of resonance phase space.

Application Value

This term has significant application value in cislunar space missions。In the orbital design phase, engineers use relevant theories for trajectory optimization；In navigation and orbit determination, it is used to improve measurement accuracy；In attitude control and orbit maintenance tasks, it ensures stable spacecraft operation。In practical applications, parameter optimization and algorithm adaptation can be combined with mission requirements to improve mission success rate and resource utilization efficiency。

  • Characteristic Exponents
  • Capture Docking Phase
  • Lunar Flyby Transfer

References

  • Ding et al., 2025 — Cislunar Space Situational Awareness via Earth-Moon Resonant Orbits
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Contributors: ouyangjiahong, Ou Yang Jiahong