pericynthion
The point in an elliptical orbit around the moon that passes closest to the moon.
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.
Where it comes from
From peri- + Cynthia (“Artemis, the Moon”) + -ion, from Ancient Greek περι- (peri-) + Κυνθία (Kunthía, “Artemis”). Compare perihelion, periastron.
Adapted from the Wiktionary entry pericynthion (CC BY-SA 4.0).