1. The problem statement, all variables and given/known data What is the time of an orbit of a satellite around the moon close to the moon's surface? What quantities do you have to look up to be able to answer this question? Radius of moon is 1736482 meters 2. Relevant equations F = Gm1m2/r^2 and maybe F=mv^2/r 2pir 3. The attempt at a solution 2 pi (1736482 meters) = 10910638.19 m = distance around moon .....and thats all I have. I don't know how to achieve time just given a radius. I do know that centripetal force has to come into play somewhere. Would the answer for the second question just be the radius? I'm so lost!