[amsat-bb] Re: Lanrangian points

[Marc Vermeersch]

- The Lagrangian points L1, L2, L3 are not stable. A satellite positioned
there would require constant positions corrections: complex satellite. L4
and L5 are stable.

- When n L points are populated and you want to populate another L point,
you have to solve an (n+2)-body problem. This becomes extremely complex.
 
- L4 and L5 are about the same distance from Earth as the moon: EME type
complications for communications.


http://www.physics.montana.edu/faculty/cornish/lagrange.pdf

http://www.physics.montana.edu/faculty/cornish/lagrange.html

http://en.wikipedia.org/wiki/Lagrangian_point

http://www.esa.int/esaSC/SEMM17XJD1E_index_0.html



-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of w7lrd at comcast.net
Sent: January 12, 2007 08:07
To: amsat-bb at amsat.org
Subject: [amsat-bb] Lanrangian points

Hello Amsat'ers
Is it possible or practical to have a communications satellite at the L1 or
L2 points.
73 Bob W7LRD
Seattle
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