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Circular orbit Totally Explained
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Everything about Circular Orbit totally explained: For other meanings of the term "orbit", see orbit (disambiguation)
In astrodynamics or celestial mechanics a circular orbit is an elliptic orbit with the eccentricity equal to 0. It is an example of a rotation around a fixed axis: this axis is the line through the center of mass perpendicular to the plane of motion.
Circular acceleration
Transverse acceleration ( perpendicular to velocity) causes change in direction. If it's constant in magnitude and changing in direction with the velocity, we get a circular motion. For this centripetal acceleration we have
»
where:
is radial distance of orbiting body from central body,
is specific angular momentum of the orbiting body,
is standard gravitational parameter.
Delta-v to reach a circular orbit
Maneuvering into a large circular orbit, for example a geostationary orbit, requires a larger delta-v than an escape orbit, although the latter implies getting arbitrarily far away and having more energy than needed for the orbital speed of the circular orbit. It is also a matter of maneuvering into the orbit. See also Hohmann transfer orbit.
Further Information
Get more info on 'Circular Orbit'.
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