Near-Rectilinear Halo Orbit Insertion, NRHOI

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

The critical maneuver of applying a velocity increment at the NRHO perilune to inject the spacecraft from an elliptical lunar orbit into NRHO. NRHOI magnitude depends on timing: about 217 m/s for IDT (due to velocity direction mismatch), about 50 m/s for PRM, and as low as 3 m/s for EPRM Type 2. When NRHOI exceeds a threshold (below 50 m/s increment value), NRHO stability breaks down, causing orbital drift or lunar impact.

Application Value

Near-rectilinear Halo orbit insertion requires precise control to ensure safe capture.

References

  • Kikuchi et al., 2022
  • Kikuchi et al., 2024
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Contributors: ouyangjiahong, Ou Yang Jiahong