Orbit - Revision history

Michel Lamontagne at 14:46, 27 August 2021

2021-08-27T14:46:21Z

Michel Lamontagne at 14:43, 27 August 2021

2021-08-27T14:43:44Z

Michel Lamontagne at 14:43, 27 August 2021

2021-08-27T14:43:15Z

Michel Lamontagne at 14:40, 27 August 2021

2021-08-27T14:40:40Z

Michel Lamontagne at 14:37, 27 August 2021

2021-08-27T14:37:51Z

Michel Lamontagne: /* Forced orbit */

2019-12-28T21:24:24Z

Forced orbit

Michel Lamontagne at 21:23, 28 December 2019

2019-12-28T21:23:20Z

Michel Lamontagne at 21:47, 19 April 2019

2019-04-19T21:47:10Z

Michel Lamontagne at 21:42, 19 April 2019

2019-04-19T21:42:00Z

Michel Lamontagne at 21:37, 19 April 2019

2019-04-19T21:37:22Z

← Older revision		Revision as of 14:46, 27 August 2021
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−	An '''Orbit''' is the trajectory of an object moving in a circular, elliptical, or hyperbolic path around a bigger object, attracted by its [[gravity]]. [[Mars]] and other planets are orbiting the [[Sun]] in an elliptical trajectory. Mars is orbited by two moons: [[Phobos]] and [[Deimos]]. The science of Orbits is Orbital mechanics, a subset of [[Astronautics]].	+	An '''Orbit''' is the trajectory of an object moving in a circular, elliptical, or hyperbolic path around a bigger object, attracted by its [[gravity]]. [[Mars]] and other planets are orbiting the [[Sun]] in an elliptical trajectory. Mars is orbited by two moons: [[Phobos]] and [[Deimos]]. The science of Orbits is Orbital mechanics, a subset of [[Astronautics]]. Space vehicles with engines can change orbits through thrust, or have continuous thrust orbits and therefore affect their orbital mechanics in various ways to achieve transfer form one planet to another.

	==LEO==		==LEO==

← Older revision		Revision as of 14:43, 27 August 2021
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−	An '''Orbit''' is the trajectory of an object moving in a circular, elliptical, or hyperbolic path around a bigger object, attracted by its [[gravity]]. [[Mars]] and other planets are orbiting the [[Sun]] in an elliptical trajectory. Mars is orbited by two moons: [[Phobos]] and [[Deimos]]. The science of Orbits is Orbital ~~dynamics~~, a subset of [[Astronautics]].	+	An '''Orbit''' is the trajectory of an object moving in a circular, elliptical, or hyperbolic path around a bigger object, attracted by its [[gravity]]. [[Mars]] and other planets are orbiting the [[Sun]] in an elliptical trajectory. Mars is orbited by two moons: [[Phobos]] and [[Deimos]]. The science of Orbits is Orbital mechanics, a subset of [[Astronautics]].

	==LEO==		==LEO==

← Older revision		Revision as of 14:43, 27 August 2021
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−	An '''Orbit''' is the trajectory of an object moving in a circular, elliptical, or hyperbolic path around a bigger object, attracted by its [[gravity]]. [[Mars]] and other planets are orbiting the [[Sun]] in an elliptical trajectory. Mars is orbited by two moons: [[Phobos]] and [[Deimos]].	+	An '''Orbit''' is the trajectory of an object moving in a circular, elliptical, or hyperbolic path around a bigger object, attracted by its [[gravity]]. [[Mars]] and other planets are orbiting the [[Sun]] in an elliptical trajectory. Mars is orbited by two moons: [[Phobos]] and [[Deimos]]. The science of Orbits is Orbital dynamics, a subset of [[Astronautics]].

	==LEO==		==LEO==

← Older revision		Revision as of 14:40, 27 August 2021
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−	'''Orbit''' is the trajectory of an object moving in a circular, elliptical, or hyperbolic path around a bigger object, attracted by its [[gravity]]. [[Mars]] and other planets are orbiting the [[Sun]] in an elliptical trajectory. Mars is orbited by two moons: [[Phobos]] and [[Deimos]].	+	An '''Orbit''' is the trajectory of an object moving in a circular, elliptical, or hyperbolic path around a bigger object, attracted by its [[gravity]]. [[Mars]] and other planets are orbiting the [[Sun]] in an elliptical trajectory. Mars is orbited by two moons: [[Phobos]] and [[Deimos]].

	==LEO==		==LEO==

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 ==Hohmann transfer orbit==
-In orbital mechanics, the '''Hohmann transfer orbit'''<ref>https://en.wikipedia.org/wiki/Hohmann_transfer_orbit</ref> is an elliptical orbit used to transfer between two circular orbits of different radii in the same plane. In general a Hohmann transfer orbit uses the lowest possible amount of energy in traveling between two objects orbiting at these radii, and so is used to send the maximum amount of mission payload with the fixed amount of energy that can be imparted by a particular rocket. Non-Hohmann transfer paths may have other advantages for a particular mission such as shorter transfer times, but will necessarily require a reduction in payload mass and/or use of a more powerful rocket.
+In orbital mechanics, the '''[[Hohmann transfer]] orbit'''<ref>https://en.wikipedia.org/wiki/Hohmann_transfer_orbit</ref> is an elliptical orbit used to transfer between two circular orbits of different radii in the same plane. In general a Hohmann transfer orbit uses the lowest possible amount of energy in traveling between two objects orbiting at these radii, and so is used to send the maximum amount of mission payload with the fixed amount of energy that can be imparted by a particular rocket. Non-Hohmann transfer paths may have other advantages for a particular mission such as shorter transfer times, but will necessarily require a reduction in payload mass and/or use of a more powerful rocket.
 ==Forced orbit==
 A forced orbit is any powered orbit that depends on a vehicle engine or aerobraking to achieve orbital transfer between two bodies.  They are used to reduce transfer times between planets and other bodies.  They require more powerful engines than low energy trajectories.  The NASA Ames [https://trajbrowser.arc.nasa.gov/traj_browser.php Trajectory browser]provides a handy way of determining rapid orbits from Earth to Mars.
-== References ==
+==References==
 [[Category:Orbit]]
 <references />

← Older revision		Revision as of 21:23, 28 December 2019
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	[[Category:Orbit]]		[[Category:Orbit]]

−	~~{{stub}}~~
	<references />		<references />

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 ==LEO==
-Low Earth Orbit is the minimum height (160 km) and velocity (8 km/s) that an object needs to stay in orbit round [[Earth]]. This orbit is the easiest to reach with currently available [[rocketry]]. It might be used to assemble a large spaceship from smaller parts that are lifted separately from Earth.  LEO is subject to drag from the Earth's atmosphere and vehicles in LEO need to be booster periodically to avoid orbital decay and re-entry.
+Low Earth Orbit is the minimum height (160 km) and velocity (8 km/s) that an object needs to stay in orbit round [[Earth]]. This orbit is the easiest to reach with currently available [[rocketry]]. It might be used to assemble a large spaceship from smaller parts that are lifted separately from Earth.  LEO is subject to drag from the Earth's atmosphere and vehicles in LEO need to be booster periodically to avoid orbital decay and re-entry.  LEO is actually a range, extending up to 2000 km above the Earth
 ==LMO==
-Low Mars orbit.  Effect of Mars shape.  Effect of Mars atmosphere.
+Low Mars orbit is similar to Low Earth Orbit.  Although Martian atmosphere is less dense, with a lower gravity it extends practically as far.
 ==Areostationary orbit==