AskDefine | Define perigee

Dictionary Definition

perigee n : periapsis in Earth orbit; the point in its orbit where a satellite is nearest to the Earth [ant: apogee]

User Contributed Dictionary

English

Noun

  1. That point in the orbit of any object which is at the smallest distance from the center of the central body. For example, the point in the moon's orbit which is the smallest distance from the center of the earth.

Translations

Related terms

Extensive Definition

This is about the orbital parameter. For the quarterly publication, see Perigee: Publication for the Arts.
Perigee is the point at which an object in orbit around the Earth – either the Moon or a spacecraft, satellite, or other body – makes its closest approach to the Earth. Often the term is used in a broader sense to define the point in an orbit where the orbiting body is closest to the body it orbits.
The Greek prefix "peri" means close or near. The suffix "gee", derived from Gaea, means Earth.
Perigee is part of the broader family of apses, astronomical terms which denote distances of orbiting bodies. Since all orbits are elliptical, each orbit contains both a nearest point and a farthest point.

External links

perigee in Bosnian: Perigej
perigee in Bulgarian: Перигей
perigee in German: Erdnähe
perigee in French: Périapside
perigee in Finnish: Perigeum
perigee in Croatian: Perigej
perigee in Hebrew: פריגיאה
perigee in Dutch: Perigeum
perigee in Polish: Perygeum
perigee in Swedish: Perigeum
perigee in Chinese: 近地點

Synonyms, Antonyms and Related Words

Earth insertion, LEM, LM, abutment, abuttal, adjacency, adjoiningness, aphelion, apogee, apposition, appulse, astronomical longitude, attitude-control rocket, autumnal equinox, ballistic capsule, burn, capsule, celestial equator, celestial longitude, celestial meridian, circle, colures, conjugation, conjunction, connection, conterminousness, contiguity, coterminousness, deep-space ship, docking, docking maneuver, ecliptic, equator, equinoctial, equinoctial circle, equinoctial colure, equinox, ferry rocket, fuel ship, galactic longitude, geocentric longitude, geodetic longitude, great circle, heliocentric longitude, injection, insertion, junction, juxtaposition, longitude, lunar excursion module, lunar module, manned rocket, meridian, module, moon ship, multistage rocket, orbit, parking orbit, perihelion, period, reentry, rocket, shuttle rocket, small circle, soft landing, solstitial colure, space capsule, space docking, space rocket, spacecraft, spaceship, syzygy, trajectory, union, vernal equinox, zodiac, zone
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