Difference between revisions of "periapsis"
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| − | For an object [[Orbit|orbiting]] a celestial body, the '''periapsis' is the point in the orbit which is ''closest'' to that body. | + | For an object [[Orbit|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 particular body being orbited. | '''Periapsis''' and '''[[apoapsis]]''' are generic terms. The prefixes "peri-" and "apo-" are commonly applied to the Greek or Roman name of the particular 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 [[Moon|lunar orbit]], perichron and apochron for [[Saturn]], perihelion and apohelion for the [[Sun]], etc. | As an example, consider perigee and apogee for [[Earth]], perijove and apojove for [[Jupiter]], periselene and aposelene or perilune and apolune for [[Moon|lunar orbit]], perichron and apochron for [[Saturn]], perihelion and apohelion for the [[Sun]], etc. | ||
Revision as of 15:04, 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 particular 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.