What does "apoapsis" mean?

The point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its maximum.

What is a synonym for "apoapsis"?

Common synonyms include: apoapse, apocenter, apocenter, apogee, aposelene, point of apoapsis.

Apoapsis

noun

noun ·Uncommon ·Advanced level

Definitions

Noun

1
The point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its maximum.
2
(astronomy) the point in an orbit farthest from the body being orbited wordnet

Synonyms

All synonyms

apoapse apocenter apocenter apogee aposelene point of apoapsis

Antonyms

All antonyms

periapsis

Etymology

From apo- + apsis.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.