angle apsis areostationary orbit areosynchronous orbit argument of periapsis asteroid astrometry axial tilt azimuth bi-elliptic transfer binary star box orbit brown dwarf capture orbit celestial coordinate system circular orbit delta-v budget dwarf planet earth eccentric anomaly ecliptic elliptic orbit ephemeris equator equatorial coordinate system escape orbit gaia mission geocentric orbit geostationary orbit geostationary transfer orbit geosynchronous orbit graveyard orbit gravity assist gravity turn ground track halo orbit heliocentric orbit heliosynchronous orbit highly elliptical orbit hohmann transfer orbit hyperbolic trajectory inclined orbit interplanetary transport network james webb space telescope lagrangian point laplace plane lissajous orbit list of orbits longitude of the ascending node low earth orbit low energy transfers lunar orbit mean anomaly mean longitude medium earth orbit minimum mass molniya orbit moon n-body problem natural satellite near equatorial orbit non-inclined orbit oberth effect orbit orbit equation orbit of the moon orbit phasing orbital eccentricity orbital elements orbital inclination change orbital maneuver orbital mechanics orbital period orbital speed orbital state vectors osculating orbit parabolic trajectory parking orbit plane of reference planet polar orbit red dwarf retrograde and direct motion semi-major axis semi-minor axis semi-synchronous orbit space interferometry mission space rendezvous specific orbital energy specific relative angular momentum subsynchronous orbit sun sun-synchronous orbit synchronous orbit true anomaly true longitude true mass tundra orbit wiktionary