 Planet-synchronous orbit (source code)

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= Planet-synchronous orbit
{title2=$T_{\rm orb}=P_{\rm spin}$}

= Synchronous circumplanetary orbit
{synonym}

A <circumplanetary orbit> whose <orbital period> equals the central planet's spin period. Its <semi-major axis> follows from <Kepler's third law>. Matching periods alone does not fix the satellite above one ground location; that additionally requires a <planet-stationary orbit>.

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