Per @herpyderp's comment below, the best animation that shows this features a 3D rotation to orient so you can see how the rock is actually moving. [1] The movement is actually closer to a distorted torus with the Earth moving as a line in the center. The rock just rotates over the surface of the torus (longterm).
[1] https://upload.wikimedia.org/wikipedia/commons/transcoded/5/...