how is possible to measure the rotation period of the solar system bodies?
Is not easy to answer fully to this question; the most easy technique is observative; you observe the planet and the features, and you record when the same feature cross at the same point; this technique depends on the smallest details visible and on their proper motion. Another and accurate technique is the measure of the doppler shift of the light reflected by the body; you need also the diameter of the planet to know the rotation period; from the doppler shift you can have the radial velocity, derive then the linear rotation velocity, and then the rotation period. If the body is unresolved, the things are more complicated; the only way is to analize the light curve of the body and trying to see any periodic signal. This technique is used to measure the period of some little asteroids and KBO objects, but the measure is affected by a large error. Many satellites orbiting close to big planets such the moon and all the galileian’s, have the same rotation and revolution period around th
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