1. The problem statement, all variables and given/known data Suppose that Captain Omega of the Imperial Space Patrol wishes to place a spy satellite in geosynchronous orbit above the mysterious Planet X, which has a mass of 5.90 x1024 kg, and a rotational period of 26.4 hours. (a) What should be the radius of the satellite's orbit? (b) What would be the orbital speed of the satellite? 2. Relevant equations 3. The attempt at a solution I used the law of periods : T2/r3 = 4∏2/GM So I rearranged that to get: r = (GMT2 / 4∏2) 1/3 I plugged in: G = 6.67 e -11 M = 5.9 e 24 kg T = 95040s I ended up with 2.06e8 m = 2.06e5 km But that answer isn't right and I don't understand what I'm doing wrong.