apoapsis

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.

Usage notes
For some celestial bodies, specialised terms are used.

Translations

 * Finnish:
 * French: ,
 * Greek:
 * Irish: apaipsis
 * Portuguese: apoapside

Etymology
(see 🇨🇬).

Noun

 * 1)  apoapsis