Perigee - Revision history

Jburk at 15:48, 10 July 2018

2018-07-10T15:48:52Z

← Older revision		Revision as of 16:48, 10 July 2018
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	<references />		<references />

	[[Category:~~Orbital Mechanics~~]]		[[Category:Orbit]]

ChristiaanK: Further clarification

2013-02-22T09:51:39Z

Further clarification

← Older revision		Revision as of 10:51, 22 February 2013
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	The equivalent for [[periapsis]] of a body in Earth orbit is '''perigee''', also called '''perigee height'''.		The equivalent for [[periapsis]] of a body in Earth orbit is '''perigee''', also called '''perigee height'''.

	Unlike with all other bodies, mission planners are usually more interested in the height above the surface for [[low Earth orbit]] spacecraft. Hence perigee height refers to the distance between the body and the Earth's surface rather than the distance between the body and the Earth's centre of mass, for all objects in Earth orbit.<ref name=Wertz>J.R. Wertz - ''Orbits and astrodynamics'' in J.R. Wertz, D.F. Everett & J.J. Puschell eds. ''Space mission engineering: The new SMAD'' ISBN 978-1-881883-15-9 p. 202</ref>		Unlike with all other bodies, mission planners are usually more interested in the height above the surface for [[low Earth orbit]] spacecraft. Hence perigee height refers to the distance between the body and the Earth's surface rather than the distance between the body and the Earth's centre of mass, for all objects in Earth orbit.<ref name=Wertz>J.R. Wertz - ''Orbits and astrodynamics'' in J.R. Wertz, D.F. Everett & J.J. Puschell eds. ''Space mission engineering: The new SMAD'' ISBN 978-1-881883-15-9 p. 202</ref> This does not occur because the word perigee is special in some way, but rather because frequent inaccurate usage has effectively shortened perigee height to perigee and replaced the other meaning.

	If you wish to anambiguously use the same measurements as with all other bodies, it is best to say [[perifocal distance]] rather than perigee.		If you wish to anambiguously use the same measurements as with all other bodies, it is best to say [[perifocal distance]] rather than perigee.

	The ~~point at which~~ a body's orbit is farthest from the Earth is known as [[apogee]].		The distance where a body's orbit is farthest from the Earth is known as [[apogee]].

	==References==		==References==

ChristiaanK: Clarify details

2013-02-22T09:15:53Z

Clarify details

← Older revision		Revision as of 10:15, 22 February 2013
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	==Definition==		==Definition==

	The [[periapsis]] of a body in [[Earth orbit]]~~, i.e~~. the ~~point where it is closest to~~ the Earth, ~~is known as its~~ '''~~perigee~~'''.		The equivalent for [[periapsis]] of a body in Earth orbit is '''perigee''', also called '''perigee height'''.

			Unlike with all other bodies, mission planners are usually more interested in the height above the surface for [[low Earth orbit]] spacecraft. Hence perigee height refers to the distance between the body and the Earth's surface rather than the distance between the body and the Earth's centre of mass, for all objects in Earth orbit.<ref name=Wertz>J.R. Wertz - ''Orbits and astrodynamics'' in J.R. Wertz, D.F. Everett & J.J. Puschell eds. ''Space mission engineering: The new SMAD'' ISBN 978-1-881883-15-9 p. 202</ref>

			If you wish to anambiguously use the same measurements as with all other bodies, it is best to say [[perifocal distance]] rather than perigee.

	The point at which a body's orbit is farthest from the Earth is known as [[apogee]].		The point at which a body's orbit is farthest from the Earth is known as [[apogee]].

			==References==
			<references />

	[[Category:Orbital Mechanics]]		[[Category:Orbital Mechanics]]

ChristiaanK: Pedantry

2013-02-20T18:04:21Z

Pedantry

← Older revision		Revision as of 19:04, 20 February 2013
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	==Definition==		==Definition==

	~~'''~~The ~~point at which~~ a body's orbit ~~makes~~ it's closest ~~approach~~ to the Earth.'''		The [[periapsis]] of a body in [[Earth orbit]], i.e. the point where it is closest to the Earth, is known as its '''perigee'''.

	The point at which a body's orbit is farthest from the Earth is known as [[~~Apogee~~]]		The point at which a body's orbit is farthest from the Earth is known as [[apogee]].


	[[Category:Orbital Mechanics]]		[[Category:Orbital Mechanics]]

Laertes: Undo revision 3788 by Laertes (Talk)

2008-10-16T00:09:50Z

Undo revision 3788 by Laertes (Talk)

← Older revision		Revision as of 01:09, 16 October 2008
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	==Definition==		==Definition==

	'''The point at which ~~an [[~~orbit~~\|orbiting]] body~~ makes it's closest approach to the ~~[[center of attraction]]~~.'''		'''The point at which a body's orbit makes it's closest approach to the Earth.'''

	The point at which ~~an orbiting~~ body is farthest from the ~~center of attraction~~ is known as [[Apogee]].		The point at which a body's orbit is farthest from the Earth is known as [[Apogee]]


	[[Category:Orbital Mechanics]]		[[Category:Orbital Mechanics]]

Laertes: Grammar

2008-10-15T01:05:48Z

Grammar

← Older revision		Revision as of 02:05, 15 October 2008
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	==Definition==		==Definition==

	'''The point at which a body~~'s orbit~~ makes it's closest approach to the ~~Earth~~.'''		'''The point at which an [[orbit\|orbiting]] body makes it's closest approach to the [[center of attraction]].'''

	The point at which a body~~'s orbit~~ is farthest from the ~~Earth~~ is known as [[Apogee]]		The point at which an orbiting body is farthest from the center of attraction is known as [[Apogee]].


	[[Category:Orbital Mechanics]]		[[Category:Orbital Mechanics]]

Ioneill: /* Definition */

2007-10-06T18:57:44Z

Definition

← Older revision		Revision as of 19:57, 6 October 2007
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	==Definition==		==Definition==

	'''The point in which a body's orbit makes it's closest approach to the Earth.'''		'''The point at which a body's orbit makes it's closest approach to the Earth.'''

	The point at which a body's orbit is farthest from the Earth is known as [[Apogee]]		The point at which a body's orbit is farthest from the Earth is known as [[Apogee]]

Ioneill: /* Definition */

2007-10-06T18:56:49Z

Definition

← Older revision		Revision as of 19:56, 6 October 2007
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	'''The point in which a body's orbit makes it's closest approach to the Earth.'''		'''The point in which a body's orbit makes it's closest approach to the Earth.'''

	The point at which a body's orbit is farthest from the Earth is known as [[Apogee		The point at which a body's orbit is farthest from the Earth is known as [[Apogee]]
	]]


	[[Category:Orbital Mechanics]]		[[Category:Orbital Mechanics]]

Ioneill at 18:56, 6 October 2007

2007-10-06T18:56:37Z

← Older revision		Revision as of 19:56, 6 October 2007
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	==Definition==		==Definition==

	The point in which a body's orbit makes it's closest approach to the Earth.		'''The point in which a body's orbit makes it's closest approach to the Earth.'''

			The point at which a body's orbit is farthest from the Earth is known as [[Apogee
			]]


	[[Category:Orbital Mechanics]]		[[Category:Orbital Mechanics]]

Ioneill: New page: ==Definition== The point in which a body's orbit makes it's closest approach to the Earth. Category:Orbital Mechanics

2007-10-06T18:40:02Z

New page: ==Definition== The point in which a body's orbit makes it's closest approach to the Earth. Category:Orbital Mechanics

New page

==Definition==

The point in which a body's orbit makes it's closest approach to the Earth.

[[Category:Orbital Mechanics]]