1. The problem statement, all variables and given/known data Given: G = 6.67259 × 10^−11 Nm2/kg2 A small Moon of a planet has an orbital period of 2.08 days and an orbital radius of 5.04 × 10^5 km. From these data, determine the mass of the planet. Answer in units of kg. 2. Relevant equations FG=FC FG=Gm1m2/r^2 FC=mv^2/r 3. The attempt at a solution First step was to convert into meters/seconds: 2.08 days to 179712 seconds 5.04x10^5km to 5.04x10^8m Use v=d/t (or v=2[tex]\pi[/tex]r/T) and get a velocity of 17621.1m/s. Use Fg=Fc and simplify to Gm/r=v^2, rearrange to v^2r/G=m. I crunched out the numbers and get a mass that's nearly as large as the sun. The problem states it's a planet, so I'm assuming I'm doing something wrong...what is it?