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Josh Cryer http://wiki.newmars.com/index.php?title=Orbital_mechanics&diff=398&oldid=prev 2009-01-20T13:24:47Z

<p>Reverted edit of OloviTaacm, changed back to last version by AdaptOrDie</p> <p><b>New page</b></p><div>==Intro==<br /> Most missions to mars are based on a [[Hohmann trajectory]]. This trajectory is the fastest trajectory possible that is minimum energy (based on the [[two body problem]]). Less energetic trajectories are available using the [[three body patched trajectories]] ([[Interplanetary super highway]]) but these can take a considerably longer length of time. <br /> <br /> For basic mission planning the [[delta V]] of the two body problem is used to calculate the [[mass fraction]] for the trip between [[Earth]] and [[Mars]]. The mass fraction tells mission planers how much mass they need to deliver to [[LEO]] in order to get a given mass to Mars. For calculating other trajectories Numeric or algebraic techniques can be used.<br /> <br /> Some useful algebraic techniques that will be presented shortly are:<br /> <br /> Finding the [[Orbital plane]] –Useful linear algebra for considering the three dimensional nature of the problem.<br /> <br /> [[Orbital Intersections]] –Useful geometry for finding where two orbits intersect each other.<br /> <br /> ==Links to New Mars Discussions==<br /> *[http://www.newmars.com/forums/viewtopic.php?t=2442 Orbital mechanics] First post: Mon Mar 15, 2004 12:04 pm, Last Post: Sun Jul 10, 2005 2:29 pm&lt;br&gt;<br /> *[http://www.newmars.com/forums/viewtopic.php?t=2410 Zero energy trajectories - a thread to discuss this topic] First post, Thu Mar 25, 2004 5:47 pm, Last Post: Fri Apr 02, 2004 6:51 pm<br /> <br /> ==Online Textbooks==<br /> <br /> *[http://ads.harvard.edu/books/1989fcm..book/ The Foundations of Celestial Mechanics]<br /> <br /> ==External Links==<br /> Orbital mechanics from: [[http://www.braeunig.us/space/orbmech.htm Rocket and Space technology]]&lt;br&gt;&lt;br&gt;<br /> Orbital Mechanics form [[http://www.marsacademy.com/traj.htm The Mars academy]]<br /> <br /> [[Category:Interplanetary Transportation]]</div>

Josh Cryer