Homework Help: Astronomy

Posted by sam on Sunday, December 23, 2012 at 2:34pm.

Saturn’s Moon Janus is observed to orbit the planet with period 0.695 days, grazing the planet with an orbital radius only 2.64 times the radius of the planet itself. Use this information to find the mass of Saturn. Express your answer as a multiple of the mass of Earth M⊕ rounded to two significant digits.

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