Semi-synchronous orbit
A semi-synchronous orbit is an orbit with a period equal to half the average rotational period of the body being orbited, and in the same direction as that body's rotation.
For Earth, a semi-synchronous orbit is considered a medium Earth orbit, with a period of just under 12 hours. For circular orbits, the altitude is approximately 20,200 km.[1][2]
See also
References
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Gravitational orbits
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