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The period of a geostationary satellite orbiting the earth over the equator is - 

The period of a geostationary satellite orbiting the earth over the equator is -  Correct Answer 24 hours

CONCEPT:

  • Geostationary Satellite: The satellite which appears stationary relative to the earth is called a geostationary or geosynchronous satellite.
  • A geostationary satellite always stays over the same place above the earth such a satellite is never at rest.
  • Such a satellite appears stationary due to its zero relative velocity w.r.t. that place on earth.
  • The orbit of a geostationary satellite is known as the parking orbit.


EXPLANATION:

  • A geostationary orbit has an orbital period equal to the Earth’s rotational period i.e. 23 hours, 56 minutes, 4 seconds, which is rounded off to 24 hours. Hence option 4 is correct.

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  • It should revolve in an orbit concentric and coplanar with the equatorial plane.
  • It sense of rotation should be the same as that of earth about its own axis i.e., in an anti-clockwise direction (from west to east).
  • Its period of revolution around the earth should be the same as that of earth about its own axis.
  • A geostationary satellite moves in a geostationary orbit.

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