About Kepler-56 d
Kepler-56 d is a common exoplanet. It lies about 2,977.8 light-years from Earth, shines at apparent magnitude 12.6, has an equilibrium temperature near 325 K and spans roughly 12.8 Earth radii.
Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.