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Circular orbit

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Astronomy, astrophysics index
Circular orbit diagram
This calc computes some characteristics of a circular orbit of two massive bodies. This kind of orbit is an ideal situation, where the movement of both bodies traces out a circle, maintaining a fixed distance between them.
Mass a
Mass b

Relative speeds
Orbital period
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As an example, by setting the two masses to 1 Moon and 1 Earth, and the distance to 400,000 km (the distance between the Earth and the Moon), we can see the well-known ~1 lunar month period.