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abstraction > mathematical concept > number > quantity > orbital quantity > orbital element > eccentricity |
eccentricity comparison table |
Subject | is an instance of | is a kind of | has symbol | has definition |
---|---|---|---|---|
orbital element | orbital quantity | One of seven quantities that must be established from observations in order to define the size, shape, and orientation of an orbit in space. | ||
eccentricity | orbital element | e | The amount by which the elliptical orbit deviates from circularity: e = c/a, where c is the distance from the center to a focus and a is the semimajor axis. |
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