How long one turn of a circular orbit at an altitude takes, in seconds,
by Kepler's third law over the same equatorial radius the apsides are
heights above. It is what can be said of a Satellite a caller has no
Elements for, from nothing but a published altitude; the period of a
Satellite with Elements is orbitalPeriodSeconds, read off the mean
motion.
How long one turn of a circular orbit at an altitude takes, in seconds, by Kepler's third law over the same equatorial radius the apsides are heights above. It is what can be said of a Satellite a caller has no Elements for, from nothing but a published altitude; the period of a Satellite with Elements is
orbitalPeriodSeconds, read off the mean motion.