A vector directed from the center of the
specified central body toward the nearest point of an elliptical
orbit created from the motion of the specified point.
CentralBody | Specify a central body. |
MeanElementType | Specify the mean element theory type for approximating motion. |
ReferencePoint | Eliptical orbit is fit to the current motion of the reference point according to the selected mean theory. |
At any time, the orbit is fit to the current
motion of the specified point according to the specified type
orbital elements. Available types are: osculating, Brouwer-Lyddane
long and short, and Kozai. The vector's magnitude is equal to the
current eccentricity of the fit orbit.