Orbital motion
type: Concept
narrower: Apsidal motion

Apsidal motion
type: Concept
contributor: AAS Frey.Katie
modified: 2020-11-03T18:14:29.398Z
modified: 2020-11-03T18:14:17.413Z
broader: Orbital motion
definition: Rotation of the line of apsides in the plane of the orbit in the same direction as the revolution of the secondary body. The major axis of the Earth's orbit rotates by 11.6 arcseconds per year.