Gravity Assist Direction

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

The relative orientation between spacecraft velocity direction at perilune and the insertion impulse during lunar gravity assist. Acceleration insertion (same direction) enters DRO from the interior; deceleration insertion (opposite direction) enters from the exterior.

Application Value

In orbital design, analysis, and control, dynamics models are used to predict spacecraft trajectories, with equations of motion solved numerically or analytically. This concept underpins critical mission capabilities including orbital maneuver design, orbit improvement, and formation flying.

References

  • 魏赞等2026北航学报
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Contributors: ouyangjiahong, Ou Yang Jiahong