bn:02917150n
Noun Concept
Categories: Orbits
EN
proper orbital elements  proper orbital element
EN
The proper orbital elements or proper elements of an orbit are constants of motion of an object in space that remain practically unchanged over an astronomically long timescale. Wikipedia
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EN
The proper orbital elements or proper elements of an orbit are constants of motion of an object in space that remain practically unchanged over an astronomically long timescale. Wikipedia
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