Orbital precession

In celestial mechanics, orbital precession may refer to:
 * Apsidal precession, where the major axis of an elliptical orbit cycles its orientation within its orbital plane.
 * Nodal precession, where non-spherical objects cause orbiting objects to change their orbits.

Not to be confused with:
 * Axial precession, where the rotation axis of a spinning object traces a conical path like a top.