List of coolest exoplanets

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.

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.

Discovered in 2006, OGLE-2005-BLG-390Lb is the coldest known exoplanet, and was nicknamed "Hoth" by NASA in reference to the planet from the Star Wars franchise.^[1]

Image (or artistic representation)	Name	Temperature (°C)	Mass	Method[a] (M⊕ or MJ)	Notes	References
	OGLE-2005-BLG-390Lb	−223 (50 K)	5.5 M🜨	Teq	The coldest known exoplanet, with a temperature lower than the melting points of oxygen and nitrogen. [b]	[4]
	OGLE-2005-BLG-071L b	−218	3.8 MJ			[5]
	PSR B1620-26 b	−201.2	2.5 MJ		One of the oldest exoplanets known, with an age of about 12.7 billion years.[note 1]	[6]
	Neptune (For reference)	−200	17.15 M🜨			[7][8]
	Uranus (For reference)	−195	14.54 M🜨			[7][9]
	TOI-969 c	−176.6+6.8 −5.8		Teq		[10]
	MOA-2007-BLG-400Lb	−173 or −239	0.5–1.3 MJ			[11]
	WASP-132d	−166+11 −18	5.16±0.52 MJ			[12]
	HD 154345 b	−162±2	1.186+0.095 −0.059 MJ	Teff		[13]
	HIP 11915 b	−155	0.99 MJ	Teq	A Jupiter analog.	[c]
	Gliese 777 b	−152±4	1.68+0.26 −0.16 MJ	Teff		[13]
	Gliese 414 Ac	−148.3±13.5	53.83 M🜨	Teq		[14]
	HD 191939 f	< −148	2.1 MJ			[15]
	Saturn (For reference)	−140	95 M🜨			[7][16]
	Kepler-167 e	−138.6±5	1.01 MJ	Teq		[17]
	HD 115954 b	−128.1+8.1 −13	8.29 MJ			[18]
	HD 118203 c	−127±3	11.1+1.3 −1.0 MJ			[19]
	GJ 1289 b	−123	>6.27±1.25 M🜨			[20]
	Epsilon Eridani b (AEgir)	−123	0.63 MJ			[21][22]
	HD 164922 b	−114	0.365 MJ			[23][24]
	Teegarden's Star d	−114	>0.82 M🜨		One of the nearest exoplanets.	[25]
	Jupiter (For reference)	−110	317.8 M🜨 (1 MJ)			[7][26]
	PSR B1257+12 d (Phobetor)	−104	3.9 M🜨	Teq	One of the first exoplanets discovered.	[27]
	HR 5183 b	−102+5.2 −5.1	3.23 MJ		A highly-eccentric orbit planet.	[28]
	TRAPPIST-1h	−101.5	0.326 M🜨			[29]
	TOI-4010 e	−99+8 −6	2.18 MJ			[30]
	HATS-59 c	−97.1±6.4	12.7 MJ			[31]
	HD 86226 b	−97±4	0.45 MJ			[32]
	GJ 1002 c	−91.3±5.2[d]	1.36 M🜨		Orbits within its star's habitable zone.	[33]
	EPIC 248847494 b	−90+25 −18	<13 MJ			[34]
	Kepler-421b	−88.2+8.6 −4.8			The transiting exoplanet with the longest orbital period around a single star. (704 days)[35]	[36]
	HD 192310 c	−88	24 M🜨			[37]
	WD 1856+534 b	−87+6 −7	<5.2+0.7 −0.8 MJ[38]	Teff	Coldest exoplanet with a measured temperature.[38]
	Kepler-16b	−85	0.333 MJ	Teq	A circumbinary planet.	[39]
	Kepler-186f	−85[e]	1.44 M🜨		Potentially habitable	[40][41]
	TOI-4600 c	−82±6	<9.27 MJ			[42]
	PSR B1257+12 c (Poltergeist)	−80	4.3 M🜨		One of the first exoplanets discovered.	[43]
	Gliese 876 b	−79	2.66 MJ			[44][45]
	TRAPPIST-1g	−75.8[f]	1.321 M🜨		Potentially habitable	[29][40][46]
	HD 217107 c	−75±3	4.37+0.13 −0.10 MJ	Teff		[13]

Unconfirmed planets

These exoplanets have not been confirmed.

Image (Or artistic representation)	Name	Temperature	Mass[g]	Notes	References
	K01174.01	-248 (25 K)		Has a size of 0.267 RJ	[47]
	Proxima Centauri c	234.2 (38.8 K)	7 M🜨		[48][49]