[amsat-bb] Re: Planet Pseudo-Keps

[ve4yz]

Keplerian Elements have nothing to do with the Earth.   To say it only
applies to earth orbiting objects would be like saying Newton's laws of
motion only apply to the earth.

They are mathematical descriptions of the motion of one body orbiting
another in an unperturbed orbit using the 6 degrees of freedom of the
orbiting body - i.e the 6 key elements of the keps. 

They predate computers and software; circa 1605. 

This not to say that they are universally applicable.  Larger or smaller as
in galactic or subatomic with perturbed orbits - all bets are off.