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pericynthion. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Etymology
From peri- + Cynthia (“Artemis, the Moon”) + -on, from Ancient Greek περι- (peri-) + Κυνθία (Kunthía, “Artemis”) + -ον (-on). Compare perihelion, periastron.
Noun
pericynthion (plural pericynthions)
- The point in an elliptical orbit around the moon that passes closest to the moon.
- Synonyms: periapsis, perilune, periselene
1963, Lunar Flight Handbook - Part 1, page 117: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.
1964, G. Kimball Miller, Jr., A simplified guidance scheme for aborting lunar landings: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.
2014, Victor Szebehely, Celestial Mechanics and Astrodynamics, →ISBN, page 491: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 iVTL.
2015, Zhigang Fang, Energy Science and Applied Technology, →ISBN:The pericynthion's distance of 15 km and the apocynthion's distance of 100 km are known.