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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 2500 K (2230 °C; 4040 °F) for exoplanets irradiated by a nearby star and greater than 2000 K (1730 °C; 3140 °F) for self-luminous exoplanets. For comparison, the hottest planet in the Solar System is Venus, with a temperature of 737 K (464 °C; 867 °F).

List of hottest exoplanets irradiated by a nearby star

[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 4643±26[1] 2.17±0.56 MJ[2] Teff Hottest known exoplanet, with a temperature comparable to K-type stars.
55 Cancri e (Janssen) 3771+669
−520[3] 		7.99 M🜨[3] Hottest confirmed rocky exoplanet.
TOI-2109b 3631±69[4] 5.02±0.75 MJ[4] Has the shortest orbital period among the hot Jupiters in 0.6725 days (16.14 hours).[4]
BD-14 3065b 3520±130[5] 12.37±0.92 MJ[5]
WASP-189b 3435±27[6] 1.99+0.16
−0.14 MJ[6]
TOI-1518b 3237±59[7] <2.3 MJ[7]
WASP-103b 3205±136[8] 1.455+0.090
−0.091 MJ[8] 		First exoplanet to have a deformation detected.[9] (see Jacobi ellipsoid)
KELT-16b 3190±61[10] 2.75 MJ[10]
WASP-12b 3128±66[11] 1.476+0.076
−0.069 MJ[12] 		This planet is so close to its parent star that its tidal forces are distorting it into an egg shape. First planet observed being consumed by its host star;[13] it will be destroyed in 3.16 ± 0.10 Ma due to tidal interactions.[14][15]
WASP-33b 3108±113[8] 2.81±0.53 MJ[16] First planet discovered to orbit a Delta Scuti variable star
WASP-18b 3067±104[8] 10.20±0.35 MJ[8]
MASCARA-1b 3062±67[17] 3.7 MJ[17]
HATS-70b 2730+140
−160[18] 		12.9 MJ[18] Teq
WASP-100b 2710[19] 2.03 MJ[19] Teff
MASCARA-5b 2700[20] 3.12 MJ[20]
WASP-76b 2670 (dayside)[21] 0.92±0.032 MJ[22] A glory effect in the atmosphere of WASP-76b might be responsible for the observed increase in brightness of its eastern terminator zone which if confirmed, it would become the first exoplanet to have its glory-like phenomenon to be discovered.[23][24]
HAT-P-7b 2667±57[25] 1.806±0.036 MJ[26] First exoplanet to have a crude map of cloud coverage
TOI-2260 b 2609±86[18] 0.011 +0.0079
−0.0041 MJ[27] 		Teq
HAT-P-70b 2562+43
−52[18] 		6.78 MJ[18] Teq
Kepler-13b 2550±80 (2277 °C)[18] 9.28(16) MJ[28] Discovered by Kepler in first four months of Kepler data.[29]
The following well-known planets are listed for the purpose of comparison.
Kepler-10b 2130+60
−120 (1857 °C)[30] 		3.58±0.33 M🜨[31] Teq First confirmed terrestrial planet to have been discovered outside the Solar System
TrES-4b 1782±29 (1509 °C)[32] 0.78±0.19 MJ[33] Largest confirmed exoplanet ever found at the time of discovery.[34] This planet has a density of 0.17 g/cm3, comparable to that of balsa wood, less than Saturn's 0.7 g/cm3.[35]
CoRoT-7b 1756±27 (1483 °C)[36] 5.74 M🜨[36] Smallest exoplanet to have its diameter measured at the time of discovery and first potential extrasolar terrestrial planet to be found.
Upsilon Andromedae b (Saffar) 1673 (1400 °C)[37] 1.70+0.33
−0.24 MJ[38] 		Teff First multiple-planet system to be discovered around a main-sequence star, and first multiple-planet system known in a multiple-star system.
WASP-17b (Ditsö̀) 1550+170
−200 (1277 °C)[26] 		0.512±0.037 MJ[26] With a density of about 0.08 g/cm3,[39] it is one of the puffiest exoplanets known.
HD 209458 b ("Osiris") 1499±15 (1226 °C)[40] 0.682+0.014
−0.015 MJ[26] 		Represents multiple milestones in exoplanetary discovery, such as the first exoplanet known observed to transit its host star, the first exoplanet with a precisely measured radius, one of first two exoplanets (other being HD 189733 Ab) to be observed spectroscopically[41][42] and the first to have an atmosphere detected, containing evaporating hydrogen, and oxygen and carbon. First extrasolar gas giant to have its superstorm measured.[43] Also first (indirect) detection of a magnetic field on an exoplanet.[44] Nicknamed "Osiris".
TrES-2b 1466±9 (1193 °C)[45] 1.253 MJ[45] Teq The darkest exoplanet known, reflecting less than 1% its star's light.
51 Pegasi b (Dimidium) 1265 (992 °C) 0.46+0.06
−0.01 MJ[46] 		Teq The first exoplanet discovered orbiting a main-sequence star.
Kepler-20e 1004±14 (735 °C)[47] <0.76 M🜨[47] The first planet smaller than Earth discovered after PSR B1257+12 b.
Venus (for reference) 735 (462 °C)[48] 0.815 M🜨[48] Hottest planet in the Solar System.

List of hottest self-luminous exoplanets

[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.

All these are measured temperatures.

Image
(Or artistic representation) 		Name Temperature
(K) 		Mass
(MJ) 		Notes
HIP 78530 b 2700±100[49] 28 ± 10[50] Likely a brown dwarf.
GQ Lupi b 2650±100[51] ~ 20 (1 – 39)[51] Likely a brown dwarf. First confirmed exoplanet candidate to be directly imaged.
CT Chamaelontis b
(CT Cha b) 		2600±250[52] 17 ± 6[52] Likely a brown dwarf. Furthest planet to be directly imaged at the distance of 622 ly (190.71 pc).
DH Tauri b 2400±100[53] 11 ± 3[53] First planet to have a confirmed circumplanetary disk[54] and youngest confirmed planet at an age of 0.7 Myr.[55]
The following well-known planets are listed for the purpose of comparison.
Beta Pictoris b 1724±15 (1451 °C)[56] 11.729 +2.337
−2.135[57] 		First exoplanet to have its rotation rate measured[58] and fastest-spinning planet discovered at the equator speed of 19.9 ± 1.0 km/s (12.37 ± 0.62 mi/s) or 71,640 ± 3,600 km/h (44,520 ± 2,240 mph).[59]

Unconfirmed candidates

[edit]

These planet candidates have not been confirmed.

Image

(Or artistic representation)

Name Temperature (K) Mass Method
Kepler-70b 7662 [a] 0.44 M🜨 Teq
Kepler-70c 6807 [b] 0.655 M🜨
WD 2226-210 b 4970[60]
Vega b 3250 [61][c] 21.9 M🜨

Notes

[edit]
  1. ^ Assuming albedo of 0.1
  2. ^ Assuming albedo of 0.1
  3. ^ Assuming bond albedo of 0.25

References

[edit]
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