Last Updated
：2025/12/04
P/2 orbit
Noun
Japanese Meaning
「P/2 orbit」とは、地球の周りを公転する軌道の一種で、月の公転周期の半分、すなわち約2週間（約一刻）の周期を持つ軌道のことです。月の重力との共鳴効果を利用するため、軌道上での挙動に特徴が見られます。
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Quizzes for review
(space flight) A lunar-resonant orbit about the Earth with a period of 1/2 that of the Moon's (P/2 is an orbit that is approximately a fortnight long)
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P/2 orbit
Mission planners decided to modify the spacecraft's trajectory to insert it into a P/2 orbit for long-term lunar observations.
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Mission planners decided to modify the spacecraft's trajectory to insert it into a P/2 orbit for long-term lunar observations.
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