periapsis Definition

point of periapsis, apolune, true anomaly, apoapsis, apastron, apojove, apocynthion, celestial point, perigee, perihelion, perilune, orbit, regrede, aphelion, orbitar, antapex, apside, angular distance, periastron, circumjovial, evection, barycenter, equinoctial point, inferior planet, orbital plane, superior planet, megaseme, anomalistic year, aerobraking, major planet, mesoseme, geosynchronous orbit, ecliptic, almucantar, sidereal time, sidereal day, astronomical year, microseme, giant planet, minor planet, inner planet, equinoctial circle, sidereal year, cosmic time, semimajor axis, antorbital, right ascension, superior rectus, lateral rectus, equinoctially, medial rectus, armil, geostationary, orbiter, inferior rectus, centre of gravity, spacecraft, asteroid, roche limit, space vehicle, hubble law, tropical year, disorb, heliometer, stratopause, outer planet, interequinoctial, altitude, synchronous orbit, standard candle, radio interferometer, lunistice, barycentre, small circle, obliquity, apogee, planetoid, conic section, asteroid belt, superlunar, protoplanet, space probe, celestial equator, equator, solar year, heliocentric, mesosphere, flyby, binary system, incentre, lunary, tacnode, ionopause, planet, proper motion, heliometry, absolute magnitude, solar day, equinoctial, geoselenic,