Temperature of planets at equilibrium

A. Calculate a realistic estimate for the temperature at the surface of Neptune using the black body radiation formula.  Use the following facts.

Radius of Neptune: 24,746 km.

Distance of Neptune from the sun: 4.46 billion km.

The remaining needed data are available in Lecture 1.

Temperature of Neptune = ________________________.

B. What wavelength is the peak of the black body emission from Neptune?

Wavelength = _______________________________