[snopercod]

What I was trying to get at was the reference point for the angle in "angular". Isn't angular momentum m*v²/r? The "r" term (radius) requires a center point.

You've got the angular momentum of the Moon orbiting the Earth, and the angular momentum of the Earth rotating on it's axis, and the angular momentum of the Earth/Moon orbiting around the Sun.

I am thinking that what the author was talking about was the sum of all three.

[RadioAstronomer]

I am thinking that what the author was talking about was the sum of all three

For the receding of the Moon, I (the author :-)) limited the description to the Earth/Moon system only.