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Loading contentThe set of numbers — typically six — that fully specify an orbit and a body's position along it: its size and shape, its orientation in space, and where the body is at a given time. They are the compact language in which every ephemeris and mission trajectory is expressed.
Facts on this topic will be cited from these primary and reference sources.
Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.