This is a list of the coolest
exoplanets known, specifically those with temperatures lower than −75 °C (198 K). Planets from the
Solar System were also included for comparison purposes.
^Dreizler, S.; Luque, R.; Ribas, I.; Koseleva, V.; Ruh, H. L.; Nagel, E.; Pozuelos, F. J.; Zechmeister, M.; Reiners, A. (2024-02-01), Teegarden's Star revisited: A nearby planetary system with at least three planets,
arXiv:2402.00923
^
abDucrot, Elsa; Gillon, M.; Delrez, L.; Agol, E.; Rimmer, P.; Turbet, M.; Günther, M. N.; Demory, B.-O.; Triaud, A. H. M. J.; Bolmont, E.; Burgasser, A.; Carey, S. J.; Ingalls, J. G.; Jehin, E.; Leconte, J. (August 2020). "TRAPPIST-1: Global Results of the Spitzer Exploration Science Program {\it Red Worlds}". Astronomy & Astrophysics. 640: A112.
arXiv:2006.13826.
doi:
10.1051/0004-6361/201937392.
ISSN0004-6361.
S2CID220041987.
^Quintana, Elisa V.; Barclay, Thomas; Raymond, Sean N.; Rowe, Jason F.; Bolmont, Emeline; Caldwell, Douglas A.; Howell, Steve B.; Kane, Stephen R.; Huber, Daniel; Crepp, Justin R.; Lissauer, Jack J.; Ciardi, David R.; Coughlin, Jeffrey L.; Everett, Mark E.; Henze, Christopher E. (2014-04-18). "An Earth-sized Planet in the Habitable Zone of a Cool Star". Science. 344 (6181): 277–280.
arXiv:1404.5667.
Bibcode:
2014Sci...344..277Q.
doi:
10.1126/science.1249403.
ISSN0036-8075.
PMID24744370.
S2CID1892595.
^The melting points of Nitrogen and Oxygen are -210°C and -218°C, respectively.[2][3]
^This was obtained using the
CalcTool luminosity converter. Using the apparent magnitude of HIP 11915 and its distance from Earth (using the uncertainty parameter of ±10 light years), this yields a range of 1.03–1.27 L☉. When used in the default 190 light-year distance (with margin of error) is 1.07+0.11 −0.09L☉. When run into simulations using the orbital distance of HIP 11915 and its planet, yields a result of 118 K.
^This is the surface temperature if GJ 1002 c has no atmosphere.
^This is the surface temperature if Kepler-186f has no atmosphere.
^This is the surface temperature if TRAPPIST-1g has no atmosphere.
^The age is the same as the globular cluster where PSR B1620-26b is located (
Messier 4), as all the stars in the cluster formed at the same time, and the planets form together with their host stars.
This is a list of the coolest
exoplanets known, specifically those with temperatures lower than −75 °C (198 K). Planets from the
Solar System were also included for comparison purposes.
^Dreizler, S.; Luque, R.; Ribas, I.; Koseleva, V.; Ruh, H. L.; Nagel, E.; Pozuelos, F. J.; Zechmeister, M.; Reiners, A. (2024-02-01), Teegarden's Star revisited: A nearby planetary system with at least three planets,
arXiv:2402.00923
^
abDucrot, Elsa; Gillon, M.; Delrez, L.; Agol, E.; Rimmer, P.; Turbet, M.; Günther, M. N.; Demory, B.-O.; Triaud, A. H. M. J.; Bolmont, E.; Burgasser, A.; Carey, S. J.; Ingalls, J. G.; Jehin, E.; Leconte, J. (August 2020). "TRAPPIST-1: Global Results of the Spitzer Exploration Science Program {\it Red Worlds}". Astronomy & Astrophysics. 640: A112.
arXiv:2006.13826.
doi:
10.1051/0004-6361/201937392.
ISSN0004-6361.
S2CID220041987.
^Quintana, Elisa V.; Barclay, Thomas; Raymond, Sean N.; Rowe, Jason F.; Bolmont, Emeline; Caldwell, Douglas A.; Howell, Steve B.; Kane, Stephen R.; Huber, Daniel; Crepp, Justin R.; Lissauer, Jack J.; Ciardi, David R.; Coughlin, Jeffrey L.; Everett, Mark E.; Henze, Christopher E. (2014-04-18). "An Earth-sized Planet in the Habitable Zone of a Cool Star". Science. 344 (6181): 277–280.
arXiv:1404.5667.
Bibcode:
2014Sci...344..277Q.
doi:
10.1126/science.1249403.
ISSN0036-8075.
PMID24744370.
S2CID1892595.
^The melting points of Nitrogen and Oxygen are -210°C and -218°C, respectively.[2][3]
^This was obtained using the
CalcTool luminosity converter. Using the apparent magnitude of HIP 11915 and its distance from Earth (using the uncertainty parameter of ±10 light years), this yields a range of 1.03–1.27 L☉. When used in the default 190 light-year distance (with margin of error) is 1.07+0.11 −0.09L☉. When run into simulations using the orbital distance of HIP 11915 and its planet, yields a result of 118 K.
^This is the surface temperature if GJ 1002 c has no atmosphere.
^This is the surface temperature if Kepler-186f has no atmosphere.
^This is the surface temperature if TRAPPIST-1g has no atmosphere.
^The age is the same as the globular cluster where PSR B1620-26b is located (
Messier 4), as all the stars in the cluster formed at the same time, and the planets form together with their host stars.