USAAAO — 2020 First Round

Proxima Centauri b has an orbital period of 11.19 days and orbits Proxima Centauri, which has a mass of 0.122 Solar masses, radius 0.154 Solar radii, and effective temperature 3042 K. Which of the following is closest to the temperature at the surface of Proxima Centauri b? Assume a surface albedo of 0.3 and that incident radiation is perfectly redistributed around the planet.