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List of hottest exoplanets

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This is a list of the hottest exoplanets so far discovered, specifically those with temperatures greater than 2,500 K (2,230 °C; 4,040 °F). For comparison, the hottest planet in the Solar System is Venus, with a temperature of 737 K (464 °C; 867 °F).

List

[edit]
This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources.

Methods for finding temperature:

Image

(Or artistic representation)

Name Temperature (K) Mass Method Notes
KELT-9b 4,643±26[1] 2.88 MJ[1] Teff Hottest known exoplanet, with a temperature comparable to K-type stars.
55 Cancri e (Janssen) 3,771+669
−520[2] 		7.99 M🜨[2] Hottest confirmed rocky exoplanet.
TOI-2109b 3,631±69[3] 5.02 MJ[3]
BD-14 3065b 3,520±130[4] 12.37±0.92 MJ[4]
WASP-189b 3,435±27[5] 1.99 MJ[5]
TOI-1518b 3,237±59[6] <2.3 MJ[6]
WASP-103b 3,205±136[7] 1.455 MJ[7]
KELT-16b 3,190±61[8] 2.75 MJ[8]
WASP-12b 3,128±66[9] 1.465 MJ[9] This planet is so close to its parent star that its tidal forces are distorting it into an egg shape.
WASP-33b 3,108±113[7] 2.093 MJ[7]
WASP-18b 3,067±104[7] 10.20 MJ[7]
MASCARA-1b 3,062±67[10] 3.7 MJ[10]
HATS-70b 2,730+140
−160[11] 		12.9 MJ[11] Teq
WASP-100b 2,710[12] 2.03 MJ[12] Teff
HIP 78530 b 2,700±100[13] 23 MJ[13] Likely a brown dwarf.
MASCARA-5b 2,700[14] 3.12 MJ[14]
WASP-76b 2,670 (dayside)[15] 0.92 MJ In this tidally locked planet where winds move 18,000 km/h, molten iron rains from the sky due to daytime temperatures exceeding 2,400 °C (2,670 K).[16][17]
HAT-P-7b 2,667±57[18] 1.682 MJ[18]
GQ Lupi b 2,650±100[19] 20 MJ[19] [19]Likely a brown dwarf.
TOI-2260 b 2,609±86[11] Teq
CT Chamaelontis b 2,600±250[20] 17 MJ[20] Teff Likely a brown dwarf.
HAT-P-70b 2,562+43
−52[11] 		6.78 MJ[11] Teq
Kepler-13b 2,550±80 (2277 °C)[11] 9.78 MJ[11]
The following well-known planets are listed for the purpose of comparison.
Kepler-10b 2,130+60
−120 (1,857 °C)[21] 		4.6 M🜨[21] Teq
TrES-4b 1,782±29 (1,509 °C)[22] 0.919 MJ[22] One of the largest known exoplanets.
CoRoT-7b 1,756±27 (1,483 °C)[23] 5.74 M🜨[23]
Upsilon Andromedae b (Saffar) 1,673 (1,400 °C)[24] 1.7 MJ[25] Teff
WASP-17b (Ditsö̀) 1,550+170
−200 (1,277 °C)[26] 		0.512 MJ[26] With a density of about 0.08 g/cm3,[27] it is one of the puffiest exoplanets known.
HD 209458 b (Osiris) 1,499±15 (1,226 °C)[28] 0.682 MJ[26]
TrES-2b 1,466±9 (1,193 °C)[29] 1.253 MJ[29] Teq The darkest exoplanet known, reflecting less than 1% its star's light.
Beta Pictoris b 1,451±15 (1,178 °C)[30] 11.729 MJ[31] Teff
51 Pegasi b (Dimidium) 1,265 (992 °C) 0.46 MJ Teq The first exoplanet discovered orbiting a main-sequence star.
Kepler-20e 1,004±14 (735 °C)[32] <0.76 M🜨[32] The first planet smaller than Earth discovered after PSR B1257+12 b.
Venus (for reference) 735 (462 °C)[33] 0.815 M🜨[33] Hottest planet in the Solar System.

Unconfirmed candidates

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These planet candidates have not been confirmed.

Image

(Or artistic representation)

Name Temperature (K) Mass Method
Kepler-70b 7,662 [a] 0.44 M🜨 Teq
Kepler-70c 6,807 [b] 0.655 M🜨
Vega b 3,250[34][c] 21.9 M🜨

Notes

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  1. ^ Assuming albedo of 0.1
  2. ^ Assuming albedo of 0.1
  3. ^ Assuming bond albedo of 0.25

References

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