And if I remember correctly the earth’s moon
has Masscons...Mass concentrations at different points
on the surface...making the orbits...
perturbed?? ( ; )
http://en.wikipedia.org/wiki/Mass_concentration_(astronomy)
I believe that that might be the reason for it’s being “tidally locked” with the earth (same face to the earth at all times).
Lumpy moon, screwed up probe orbit:
http://science.nasa.gov/science-news/science-at-nasa/2006/06nov_loworbit/
One of the moon’s mysteries solved: Origin of mascon basins [impacts of course]
http://www.sciencedaily.com/releases/2013/05/130530142009.htm
Team solves the origin of the Moon’s ‘mascons’ mystery
http://phys.org/news/2013-05-team-moon-mascons-mystery.html