A satellite in a synchronous orbit has an orbital period equal to the rotational period of the object it is orbiting. If the orbit has zero eccentricity and inclination, the satellite will remain stationary over a point on the object's equator at all times.

The semi-major axis of a synchronous orbit around a primary object is:

where G is the gravitational constant, mp is the primary's mass, and τ is the rotational period of the primary. The semi-major axes of synchronous orbits around several Solar System bodies are given in the table below.

synchronous orbithas an orbital period equal to the rotational period of the object it is orbiting. If the orbit has zero eccentricity and inclination, the satellite will remain stationary over a point on the object's equator at all times.The semi-major axis of a synchronous orbit around a primary object is:

where G is the gravitational constant, mp is the primary's mass, and τ is the rotational period of the primary. The semi-major axes of synchronous orbits around several Solar System bodies are given in the table below.

Object

Period

Radius

Orbit Radius

Orbit Altitude

† Average