Wiktionary
n. 1 (context of an astronomic object English) The time taken to rotate about its axis relative to the background stars. 2 (context of a rotating object on the earth English) The time taken to rotate about its axis relative to the earth (assumed fixed).
Usage examples of "rotational period".
However, you do have a lot of leeway when determining the rotational period of your planet.
Erythro, with a rotational period of twenty-three hours and sixteen minutes (equal to the period of its revolution about Megas), had a magnetic field that was similar, in intensity, to Earths.
Erythro, with a rotational period of twenty-three hours and sixteen minutes (equal to the period of its revolution about Megas), had a magnetic field that was similar, in intensity, to Earth’.
Erythro, with a rotational period of twenty-three hours and sixteen minutes (equal to the period of its revolution about Megas), had a magnetic field that was similar, in intensity, to Earth's.
At the time of our landing here, Solitude had a rotational period of 18 hours.
Also, given the rotational period of just over thirty-two hours and an inclination of the axis of eighteen degrees .
The only puzzling feature was the rotational period of the planet: exactly six Earth months.
Further, the science officer had utilized stable cloud masses at the poles to determine the rotational period of the planet, allowing him to pinpoint the area on the surface where the pulse had originated.
She wondered, as she crossed the floor to the reception area if the mock light also followed Ballybran's rotational period.
The only two units of time that could be considered to be relatively permanent (for humans in the relative short term) are the rotational period of the Earth and the sidereal year.
So far the subterfuge had worked, and with the planet's extremely slow rotational period, Vance had been able to keep a watch on but signals from the direction of Kilrah, now three hundred and eighty light years away.