Geosynchronous orbit: Difference between revisions
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[[File:Geosynchronous1.GIF|thumb|right|A diagram of a | [[File:Geosynchronous1.GIF|thumb|right|A diagram of a geosynchronous orbit]] | ||
A '''geosynchronous orbit''' is an orbit around a planet with an orbital period matching the planet's sidereal rotation period. The term geosynchronous can be used to describe any orbital pattern with a period equal to that of its orbiting body, and in the same direction as the parent's rotation, but is specifically used for orbits with no inclination and a semimajor axis of equal length to the minor axis (i.e. circular). Satellites in geosynchronous orbits appear to maintain their longitude, while their latitude oscillates in a 24-hour period. The geosynchronous orbit over the equator is called the '''geostationary orbit'''. Satellites in the geostationary orbit appear stationary relative to the planet's surface. | A '''geosynchronous orbit''' is an orbit around a planet with an orbital period matching the planet's sidereal rotation period. The term geosynchronous can be used to describe any orbital pattern with a period equal to that of its orbiting body, and in the same direction as the parent's rotation, but is specifically used for orbits with no inclination and a semimajor axis of equal length to the minor axis (i.e. circular). Satellites in geosynchronous orbits appear to maintain their longitude, while their latitude oscillates in a 24-hour period. The geosynchronous orbit over the equator is called the '''geostationary orbit'''. Satellites in the geostationary orbit appear stationary relative to the planet's surface. | ||
== | == Uses == | ||
[[Orbital defense platform | [[Orbital defense platform]]s in particular make use of geosynchronous orbits to protect certain ground regions from attack; [[Cairo Station]], for example, orbited over the city of [[Cairo (city)|Cairo]], taking its name. The [[Athens Station]] orbited above [[Greece|Athens, Greece]], while [[Malta Station]] was situated over the island of [[Malta]].<ref>'''[[Halo 2]]''', campaign level ''[[The Armory]]''</ref> The terminus stations of [[space elevator]]s are also anchored to a geosynchronous, near-geostationary orbit.<ref>[http://halo.xbox.com/en-us/intel/theuniverse/locations/gallery/space-tether/e9b2f438-9b5b-477e-8e52-d4e6801e9d5b '''Halo Waypoint''': ''Space Tether'']</ref> | ||
==Sources== | ==Sources== | ||
<references/> | <references/> | ||
[[Category:Astronomy]] | [[Category:Astronomy]] | ||
