List of hottest exoplanets
Appearance
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]Methods for finding temperature:
- Teff: Measured effective temperature.
- Teq: The temperature of the planet has not been measured, so it is listed with the calculated equilibrium temperature.
Image
(Or artistic representation) |
Name | Temperature (K) | Mass | Method | Notes |
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KELT-9b | 4,643±26[1] | 2.88 MJ[1] | Teff | Hottest known exoplanet, with a temperature comparable to K-type stars. |
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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] | |||
WASP-189b | 3,435±27[4] | 1.99 MJ[4] | |||
TOI-1518b | 3,237±59[5] | <2.3 MJ[5] | |||
WASP-103b | 3,205±136[6] | 1.455 MJ[6] | |||
KELT-16b | 3,190±61[7] | 2.75 MJ[7] | |||
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WASP-12b | 3,128±66[8] | 1.465 MJ[8] | 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[6] | 2.093 MJ[6] | |||
WASP-18b | 3,067±104[6] | 10.20 MJ[6] | |||
MASCARA-1b | 3,062±67[9] | 3.7 MJ[9] | |||
HATS-70b | 2,730+140 −160[10] |
12.9 MJ[10] | Teq | ||
WASP-100b | 2,710[11] | 2.03 MJ[11] | Teff | ||
HIP 78530 b | 2,700±100[12] | 23 MJ[12] | Likely a brown dwarf. | ||
MASCARA-5b | 2,700[13] | 3.12 MJ[13] | |||
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WASP-76b | 2,670 (dayside)[14] | 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).[15][16] | |
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HAT-P-7b | 2,667±57[17] | 1.682 MJ[17] | ||
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GQ Lupi b | 2,650±100[18] | 20 MJ[18] | [18]Likely a brown dwarf. | |
TOI-2260 b | 2,609±86[10] | Teq | |||
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CT Chamaelontis b | 2,600±250[19] | 17 MJ[19] | Teff | Likely a brown dwarf. |
HAT-P-70b | 2,562+43 −52[10] |
6.78 MJ[10] | Teq | ||
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Kepler-13b | 2,550±80 (2277 °C)[10] | 9.78 MJ[10] | ||
The following well-known planets are listed for the purpose of comparison. | |||||
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Kepler-10b | 2,130+60 −120 (1,857 °C)[20] |
4.6 M🜨[20] | Teq | |
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TrES-4b | 1,782±29 (1,509 °C)[21] | 0.919 MJ[21] | One of the largest known exoplanets. | |
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CoRoT-7b | 1,756±27 (1,483 °C)[22] | 5.74 M🜨[22] | ||
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Upsilon Andromedae b (Saffar) | 1,673 (1,400 °C)[23] | 1.7 MJ[24] | Teff | |
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WASP-17b (Ditsö̀) | 1,550+170 −200 (1,277 °C)[25] |
0.512 MJ[25] | With a density of about 0.08 g/cm3,[26] it is one of the puffiest exoplanets known. | |
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HD 209458 b (Osiris) | 1,499±15 (1,226 °C)[27] | 0.682 MJ[25] | ||
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TrES-2b | 1,466±9 (1,193 °C)[28] | 1.253 MJ[28] | Teq | The darkest exoplanet known, reflecting less than 1% its star's light. |
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Beta Pictoris b | 1,451±15 (1,178 °C)[29] | 11.729 MJ[30] | Teff | |
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51 Pegasi b (Dimidium) | 1,265 (992 °C) | 0.46 MJ | Teq | The first exoplanet discovered orbiting a main-sequence star. |
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Kepler-20e | 1,004±14 (735 °C)[31] | <0.76 M🜨[31] | The first planet smaller than Earth discovered after PSR B1257+12 b. | |
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Venus (for reference) | 735 (462 °C)[32] | 0.815 M🜨[32] | Hottest planet in the Solar System. |
Unconfirmed candidates
[edit]These planet candidates have not been confirmed.
Image
(Or artistic representation) |
Name | Temperature (K) | Mass | Method |
---|---|---|---|---|
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Kepler-70b | 7,662 [a] | 0.44 M🜨 | Teq |
Kepler-70c | 6,807 [b] | 0.655 M🜨 | ||
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Vega b | 3,250[33][c] | 21.9 M🜨 |
Notes
[edit]- ^ Assuming albedo of 0.1
- ^ Assuming albedo of 0.1
- ^ Assuming bond albedo of 0.25
References
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