A spherical satellite of 2m diameter circles the earth at an altitude of 600 miles. Assuming all surfaces are black, calculate the equilibrium temperature of the satellite on the 'dark' side and on the 'bright' side of the earth. Assume the earth has a radius of 4,000 miles and a temperature of 200C. The suns temperature can be taken to be 6,700K and it has a radius of 433,000 miles. The distance between the sun and the earth is 93,000,000 miles. View factor of a small sphere to a much larger one: Where R= rz is the radius of the large sphere and x is the separation distance between the spheres.