Wiktionary
sidereal period
n. 1 (context astronomy English) sidereal orbital period 2 (context astronomy English) sidereal rotation period
Usage examples of "sidereal period".
This would have been impossible for us before, for Leda's sidereal period is 24 days, and we could have taken that long just to catch it once we reached its orbit.
But that's an F2 star, a little more massive than Sol, so the planet's sidereal period is only nine months and its average temperature is higher than Terra or Alfzar.