- высота периселения
- …on December 24 Apollo-8 went into selenocentric orbit (perilune 112 km, apolune 312 km…The orbit perilune was 110 km and apolune 313 km, which were corrected to 111 and 113 km, respectively.
Русско-английский словарь по космонавтике. Юрий Правиков. 2004.