Learn more by clicking the Google or Facebook button below. Population Demographics for Tonasket, Washington in 2016 and 2017. Other Counties and Cities in Washington.
Sidereal Period versus Synodic Period. 1  Measuring the motion of the Moon around the Earth relative to the distant stars leads us to what is called the sidereal period. 2  Measuring the motion of the Moon around the Earth relative to the Sun leads us to what is called the synodic (pronounced si-nod-ik) period.
= 1.496Ã 10 8 km); rotation and revolution are the sidereal rotation period and sidereal orbital period, h = hours, d = Earth sidereal days; eccentricity is the orbital eccentricity = 1  (perihelion/semi-major axis); and inclination is the tilt of the orbit with respect to the Earth's orbit.