Libration of the moon

[P3D John W Roberts <roberts@xxxxxxxxxxxxxxxxx>]

As I understand it, a fairly simple explanation of the phonomenon is as
follows:
  The moon rotates about its axis at an essentially constant angular
  velocity. However its orbit around the Earth is not a perfect circle,
  so in accordance with Kepler's laws of motion, the moon does not travel
  around the Earth at a constant angular velocity (v. and a.v. are greater
  when the moon is closer to the Earth). Because the orbital and rotational
  angular velocities are not always of the same magnitude, the moon appears
  to rotate back and forth slightly from the viewpoint of an observer on the
  Earth.

Complicating factors:
 - The moon's orbit is also tilted with respect to the Earth's axis of 
     rotation.
 - The moon's center of gravity is not at its geometric center, which
     causes the moon's rate of rotation to be more strongly tied in to
     its motion around the Earth.
And many more.

Does this sound *approximately* correct?

John R


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