Julian Day
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Semimajor and semiminor axes
The Semimajor axis of an orbit is defined as one-half of the long axis of an ellipse or an elliptical orbit, a measure of the size of the orbit.
Semimajor and semiminor axes
The Semimajor axis of an orbit is defined as one-half of the long axis of an ellipse or an elliptical orbit, a measure of the size of the orbit.