About GJ 1289 b
GJ 1289 b is a common exoplanet. It lies about 27.2 light-years from Earth, shines at apparent magnitude 12.48, has spectral type M4.5 Ve and has an equilibrium temperature near 150 K.
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.