List of coolest stars

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This is a list of the coolest known stars in the universe in terms of increasing temperature. Most of these stars are brown dwarfs, red dwarfs, but one of them is a red hypergiant.

Name Temperature in Kelvin Notes, caveats
WISE J0855-0714 225–260[1] This is probably the coolest star known. It has a temperature comparable to that of Icons-flag-aq.png Antarctica.
CFBDSIR 1458+10B 370
2MASS 0939-2448 A/B 650[2]
2MASS 0415-0935 764
2M 1237+6526 850[3]
SCR 1845-6357B 950
2MASS 0243-2453 1,050 Brown dwarf star.
Cha 110913-773444 1,350
2MASS 0036+1821 1,650
2MASS 1507-1627 1,650
OTS 44 1,700 Brown dwarf star.
S Cassiopeiae 1,800 S Cassiopeiae is among the largest stars known in the Milky Way.
  1. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  2. Leggett, S. K.; Cushing, Michael C.; Saumon, D.; Marley, M. S.; Roellig, T. L.; Warren, S. J.; Burningham, Ben; Jones, H. R. A. et al. (2009). "The Physical Properties of Four ~600 K T Dwarfs". The Astrophysical Journal 695 (2): 1517–1526. arXiv:0901.4093. Bibcode 2009ApJ...695.1517L. doi:10.1088/0004-637X/695/2/1517.
  3. Liebert; Burgasser (2007). "On the Nature of the Unique Hα-emitting T Dwarf 2MASS J12373919+6526148". Astronomy & Astrophysics 655 (1): 522–527. arXiv:astro-ph/0609793. Bibcode 2007ApJ...655..522L. doi:10.1086/509882.