::Orbital elements


Elements::orbit    Orbital::plane    Omega::anomaly    Omega::epoch    Angle::orbital    Ellipse::orbits

Orbital elements are the parameters required to uniquely identify a specific orbit. In celestial mechanics these elements are generally considered in classical two-body systems, where a Kepler orbit is used (derived from Newton's laws of motion and Newton's law of universal gravitation). There are many different ways to mathematically describe the same orbit, but certain schemes, each consisting of a set of six parameters, are commonly used in astronomy and orbital mechanics.

A real orbit (and its elements) changes over time due to gravitational perturbations by other objects and the effects of relativity. A Keplerian orbit is merely an idealized, mathematical approximation at a particular time.

Orbital elements sections
Intro   Keplerian elements    Orbit prediction    Perturbations and elemental variance    See also    References    External links   

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