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Semi-synchronous orbit

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Title: Semi-synchronous orbit  
Author: World Heritage Encyclopedia
Language: English
Subject: GPS Block IIF, USA-242, Geosynchronous orbit, USA-206, Geocentric orbit
Collection: Earth Orbits
Publisher: World Heritage Encyclopedia

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


  1. ^ "NASA Technical Standard 8719.14 (draft)" (PDF). NASA Orbital Debris Program Office. 8 Aug 2006. 
  2. ^ "Catalog of Earth Satellite Orbits". 6 Sep 2012. 

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