CoRoT-20c is a brown dwarf-massed substellar companion found by the HARPS radial-velocity search terrestrial telescope. It orbits CoRoT-20, a G2V star in the constellation of Monoceros. It has an effective temperature of 5,880 K (5,610 °C; 10,120 °F), a mass of 1.14 M☉, a radius of 0.92 R☉, and an above-solar metallicity. This is a young planet, with an estimated age between 0.06 and 0.14 Gyr.[2]
^Rey, J.; Bouchy, F.; Stalport, M.; Deleuil, M.; Hébrard, G.; Almenara, J. M.; Alonso, R.; Barros, S. C. C.; Bonomo, A.; Cazalet, G.; Delisle, J. B.; Díaz, R. F.; Fridlund, M.; Guenther, E. W.; Guillot, T.; Montagnier, G.; Moutou, C.; Lovis, C.; Queloz, D.; Santerne, A.; Udry, S. (2018). "A 4.6-year period brown-dwarf companion interacting with the hot-Jupiter CoRoT-20 b". Astronomy & Astrophysics. A115: 619. arXiv:1807.01229. doi:10.1051/0004-6361/201833180. S2CID126274116.
