pericynthion

Definitions

The point in an elliptical orbit around the moon that passes closest to the moon.

Examples

“Trajectory sensitivities are determined for ü=3hr and the first adjustment method is used to calculate⟳ that a midcourse correction AV_ = 7.3m/sec is required to correct⟳ to the nominal pericynthion point⟳ and time.”

“The nominal landing trajectory used in this study⟳ consists of applying constant thrust at the pericynthion of the synchronous orbit and performing a gravity-turn descent to a point⟳ about 5,500 feet above the lunar surface.”

“Because of the "requirement" that the pericynthion of this type⟳ of trajectory lie⟳ on the earth-moon axis, the pericynthion loci of realistic panes pass⟳ through or very close⟳ to the earth-moon axis regardless of i_(VTL).”

“The pericynthion's distance of 15 km and the apocynthion's distance of 100 km are known.”

CEFR level