geostationary orbit

A geostationary orbit (GEO) is a geosynchronous orbit directly above the Earth's equator (0° latitude), with orbital eccentricity of zero. From the ground, a geostationary object appears motionless in the sky and is therefore the orbit of most interest to operators of artificial satellites (including communication and television satellites). Due to the constant 0° latitude, satellite locations may differ by  longitude only.
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Noun
1. a geosynchronous orbit that is fixed with respect to a position on the Earth
(hypernym) geosynchronous orbit

A circular orbit in the equatorial plane, any point on which revolves about the Earth in the same direction and with the same period as the Earth's rotation. (188 ) Note: An object in a geostationary orbit will remain directly above a fixed point on the equator at a distance of approximately 42,164 km from the center of the Earth, i.e. , approximately 35,787 km above mean sea level.

geostationary orbit
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