About Kepler-218 d
Kepler-218 d is an uncommon exoplanet. It lies about 2,140.8 light-years from Earth, shines at apparent magnitude 14.04, has an equilibrium temperature near 356 K and spans roughly 2.66 Earth radii.
Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.