The geometric plane into which the orbit of a celestial body is embedded when it orbits another celestial body
Orbital plane refers to the geometry in which the orbit is embedded when one celestial body orbits anotherplane。As long as there are three points in space that are not on the same straight line, a plane can be determined. The most common example is: there is a massive object in the center, the position of an object around the central object, and the new position of the object around the center after a period of time.
staysolar systemInner, planetary orbitdip angleIs defined as its orbital plane andearthInter orbitalangle。In other cases, likesatelliteThe most convenient definition of the orbit around a planet is the orbital plane and the planetEquatorial planeThe included angle between.
In real celestial bodiesgravitational fieldDue to the uneven mass distribution and irregular shape of celestial bodies and the gravity of other celestial bodiesPerturbation, the track is not a plane curve, and it rotates slowly, that is, the intersectionPrecession。
When launching spaceships and artificial satellites, the orbital plane is a parameter that defines the orbit.Usually, a large number ofpropellantTo change the orbital plane of an object.Other parameters, such asOrbital period, orbitalEccentricityAnd orbital phase (phase) can be easily changed with the propulsion system.
becauseearthIs not a perfect natural sphere, soEarth gravityIt is non spherical. The orbit plane of the artificial satellite will be changed by perturbation, making the orbit plane slowly rotate around the earthRail inclinationofAt a particular angle, the orbital plane will followsunlightAround the earthSun synchronous orbit。
Spaceship launchingLaunch windowIts time usually depends on that when it reaches the target, the target is located at the intersection of its orbital plane and the ecliptic plane.
