Concept information
Preferred term
Apsidal 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. (en)
Broader concept
- Orbital motion (en)
URI
http://astrothesaurus.org/uat/62
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