Difference between revisions of "periapsis"

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(Original author put "apoapsis" when he meant "periapsis")
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For an object orbiting a celestial body, the apoapsis is the point in its orbit which is '''closest''' from that body.
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For an object orbiting a celestial body, the '''periapsis' is the point in the orbit which is ''closest'' to that body.
  
Periapsis and apoapsis are generic terms. The prefixes "peri-" and "ap-" are commonly applied to the Greek or Roman names of the bodies which are being orbited.
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'''Periapsis''' and '''apoapsis''' are generic terms. The prefixes "peri-" and "apo-" are commonly applied to the Greek or Roman name of the particlyar body being orbited.
  
For example, look for perigee and apogee at Earth, perijove and apojove at Jupiter, periselene and apselene or perilune and apolune in lunar orbit, perichron and apochron if you're orbiting Saturn, and perihelion and aphelion if you're orbiting the sun, and so on.
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As an example, consider perigee and apogee for Earth, perijove and apojove for Jupiter, periselene and aposelene or perilune and apolune for lunar orbit, perichron and apochron for Saturn, perihelion and apohelion for the Sun, etc.

Revision as of 15:58, 3 August 2005

For an object orbiting a celestial body, the periapsis' is the point in the orbit which is closest to that body.

Periapsis and apoapsis are generic terms. The prefixes "peri-" and "apo-" are commonly applied to the Greek or Roman name of the particlyar body being orbited.

As an example, consider perigee and apogee for Earth, perijove and apojove for Jupiter, periselene and aposelene or perilune and apolune for lunar orbit, perichron and apochron for Saturn, perihelion and apohelion for the Sun, etc.