List of potentially habitable exoplanets

The following list includes some of the potentially habitable exoplanets discovered so far. It is mostly based on estimates of habitability by the Habitable Worlds Catalog (HWC), and data from the NASA Exoplanet Archive. The HWC is maintained by the Planetary Habitability Laboratory at the University of Puerto Rico at Arecibo.

Surface planetary habitability is thought to require an orbit at the right distance from the host star for liquid surface water to be present, in addition to various geophysical and geodynamical aspects, atmospheric density, radiation type and intensity, and the host star's plasma environment.

Main list

This is a list of confirmed exoplanets within the circumstellar habitable zone that are either under 10 Earth masses or smaller than 2.5 Earth radii and thus have a chance of being rocky. Note that inclusion on this list does not guarantee habitability, and in particular the larger planets are less likely to have a rocky composition and more likely to be mini-Neptunes. Earth is included for both comparison and reference, while Venus and Mars are included for reference only.

Note that mass and radius values prefixed with "~" have not been measured, but are predicted from a mass–radius relationship.

Object	Star	Star type	Mass (M_⊕)	Radius (R_⊕)	Density (g/cm³)	Flux (F_⊕)	T_eq (K)	Period (days)	Distance (ly)	Refs/notes
Earth (reported for reference)	Sun	G2V	1.00	1.00	5.514	1.00	255	365.25	0	Only planet confirmed to support life
Venus (reported for reference)	Sun	G2V	0.815	0.950	5.243	1.911	244.261	224.70	0.0000042
Mars (reported for reference)	Sun	G2V	0.107	0.533	3.934	0.431	209.8	686.98	0.0000058–0.000042
55 Cancri Bc	55 Cancri B	M4V	≥5.3	—	—	0.3	200	33.7	40.9
Gliese 12 b	Gliese 12	M4V	0.71 or 0.95	0.904+0.037 −0.034	5.3 or 7.1	1.6±0.2	315	12.7	39.7	Near inner edge of HZ, might resemble Venus
Gliese 163 c	Gliese 163	M3V	≥6.80	—	—	1.25	277	25.6	49
Gliese 180 d	Gliese 180	M2V	≥7.56	—	—	0.26	—	106.3	39
Gliese 251 c	Gliese 251	M3V	≥3.84	—	—	—	—	53.6	18.2
Gliese 357 d	Gliese 357	M2V	≥6.10	—	—	0.38	200	55.7	31
Gliese 433 d	Gliese 433	M2V	≥5.22	—	—	1.06	—	36.1	29.6
Gliese 514 b	Gliese 514	M1V	≥5.20	—	—	0.28+0.51 −0.166	202	140.4	25	Highly eccentric
Gliese 555 b	Gliese 555	M4V	≥5.46	—	—	0.5	214	36.2	20.4
Gliese 625 b	Gliese 625	M2V	≥2.82	—	—		—	14.628	21.1	Likely too hot
Gliese 667 Cc	Gliese 667 C	M1V	≥3.81	~1.54	—	0.88	277	28.1	23.62
GJ 1002 b	GJ 1002	M5V	≥1.08	~1.03	—	0.67	231	10.3	15.8
GJ 1002 c	GJ 1002	M5V	≥1.36	1.1	—	0.26	182	21.2	15.8
GJ 1061 c	GJ 1061	M5V	1.81+0.13 −0.11	~1.18	—	1.45	275	6.7	12
GJ 1061 d	GJ 1061	M5V	1.67+0.17 −0.16	~1.16	—	0.69	218	13.0	12
GJ 3293 d	GJ 3293	M2V	≥7.60	—	—	0.59	223	48.1	66
GJ 3998 d	GJ 3998	M1V	≥6.07	—	—		—	41.8	58
HD 20794 d	HD 20794	G8V	≥5.82	—	—	—	—	647.6	19.7	Highly eccentric orbit
HD 216520 c	HD 216520	K0V	≥9.44	—	—	1.28	—	154.4	64
HIP 38594 b	HIP 38594	M0V	≥8.10	—	—	1.34	—	60.7	58
K2-9b	K2-9	M2V	5.69	2.25	—	—	314	18.4	271
K2-72e	K2-72	M2V	~2.21	1.29	—	1.30	261	24.2	217
K2-155d	K2-155	K?V	4.27	1.64	—	—	289	40.6	290
K2-288Bb	K2-288 B	M3V	4.27	1.91	—	0.44	207	31.4	214
K2-332b	K2-332	M3.5V	—	2.20	—	1.17	—	17.7	402
Kepler-22b	Kepler-22	G5V	~9.1 or ~35	2.38	—	1.10	261	289.9	635
Kepler-51 e	Kepler-51	G4V	1.6-6.1	—	—	—		256.9	2,620
Kepler-62e	Kepler-62	K2V	4.5+14.2 −2.6	1.61	—	1.15	264	122.4	981
Kepler-62f	Kepler-62	K2V	2.8±0.4	1.41	—	0.41	204	267.3	981
Kepler-155c	Kepler-155	M0V	—	2.24	—	1.05	—	52.7	957
Kepler-174d	Kepler-174	K3V	—	2.19	—	0.59	206	247.4	1,254
Kepler-186f	Kepler-186	M1V	1.44+2.33 −1.12	1.17	—	0.29	188	129.9	579
Kepler-283c	Kepler-283	K5V	—	1.82	—	0.89	248	92.7	1,526
Kepler-296e	Kepler-296	K7V	2.96	1.52	—	1.41	276	34.1	737
Kepler-296f	Kepler-296	K7V	—	1.80	—	0.44	225	63.3	737
Kepler-440b	Kepler-440	K6V	—	1.91	—	1.44	273	101.1	981
Kepler-442b	Kepler-442	K5V	2.36+5.9 −1.3	1.35	—	0.70	233	112.3	1,193
Kepler-443b	Kepler-443	K3V	—	2.35	—	0.89	247	177.7	2,615
Kepler-705b	Kepler-705	M?V	—	2.11	—	0.77	243	56.1	903
Kepler-725 c	Kepler-725	G9V	9.7	—	—	—		207.5	2,526
Kepler-1229b	Kepler-1229	M?V	2.540	1.40	—	0.32	213	86.8	865
Kepler-1410b	Kepler-1410	K?V	—	1.78	—	1.07	274	60.9	1196
Kepler-1455b	Kepler-1455	K?V	—	2.10	—	1.30		49.3	1280
Kepler-1540b	Kepler-1540	K?V	—	2.49	—	0.78	250	125.4	799
Kepler-1544 b	Kepler-1544	K2V	—	1.78	—	0.84	248	168.8	1092
Kepler-1606b	Kepler-1606	G7V	—	2.07	—	1.64	277	196.4	2710
Kepler-1649c	Kepler-1649	M5V	1.20	1.06	—	0.75	237	19.5	301
Kepler-1652b	Kepler-1652	M?V	—	1.60	—	0.84	244	38.1	822
Kepler-1653 b	Kepler-1653	K?V	—	2.17	—	1.04	258	140.3	2461
Kepler-1701b	Kepler-1701	K?V	—	2.22	—	1.42	275	169.1	1904
LHS 1140 b	LHS 1140	M4V	5.60	1.73	5.9±0.3	0.43	226	24.7	49	Likely an ocean world with an atmosphere
LP 890-9 c	LP 890-9	M6V	—	1.37	—	0.91	272	8.46	105
Luyten b	Luyten's Star	M3V	≥2.89	~1.35	—	1.06	258	18.65	12.3
Proxima Centauri b	Proxima Centauri	M5V	≥1.07^: 16	1.17±0.23	—	0.70	228	11.186	4.25	Affected by stellar flare, possibly affected by high radiation flux
Ross 128 b	Ross 128	M4V	≥1.40	~1.80	—	1.48	280	9.87	11.0
Ross 508 b	Ross 508	M4V	≥4.00	—	—	1.32	—	10.8	37
Struve 2398 Bc	Struve 2398	M4V	≥3.4	—	—			37.9	11.5
Teegarden's Star b	Teegarden's Star	M7V	≥1.05	~1.02	—	1.15	264	4.91	12.5
Teegarden's Star c	Teegarden's Star	M7V	≥1.11	~1.04	—	0.37	199	11.4	12.5
L 98-59 f	L 98-59	M3V	≥2.97	—	—	>1	289	23.07	34.6
TOI-270 d	TOI-270	M3V	4.2	2.1				11.4	73.3
TOI-700 d	TOI-700	M2V	~1.72	1.14	—	0.87	246	37.4	101
TOI-700 e	TOI-700	M2V	0.82	0.95	—	1.27	273	27.8	101
TOI-715 b	TOI-715	M4V	3.02	1.55	—	0.67	234	19.29	137
TOI-1452 b	TOI-1452	M4V	4.82	1.67	—	—	290~320	11	100
TOI-2257 b	TOI-2257	M3V	5.712+4.288 −2.311	2.20	—	0.57+1.68 −0.31	256+61 −17	35.2	188	Highly eccentric
TOI-2285 b	TOI-2285	M4V	4.1	1.75	—	—	284	27	137	Likely too hot
TOI 5799 c	TOI 5799	M2V	—	1.76	—	—	~336	14	90.7	Likely too hot
TRAPPIST-1e	TRAPPIST-1	M8V	0.69	0.92	5.65	0.65	230	6.1	41	Confirmed to be rocky. Possibly has an atmosphere.
TRAPPIST-1f	TRAPPIST-1	M8V	1.04	1.04	3.3 ± 0.9	0.37	200	9.2	41	Confirmed to be rocky
TRAPPIST-1g	TRAPPIST-1	M8V	1.32	1.13	4.186	0.25	182	12.4	41	Confirmed to be rocky
Wolf 1069 b	Wolf 1069	M5V	≥1.26	~1.08	—	0.65	250	15.6	31.2
Wolf 1061c	Wolf 1061	M3V	≥3.41	~1.60	—	1.30	271	17.9	13.8

Current candidates

This is a list of notable exoplanets within the circumstellar habitable zone that are either under 10 Earth masses or smaller than 2.5 Earth radii and have not yet been confirmed. Earth is included for both comparison and reference, while Venus and Mars are included for reference only.

Object	Star	Star type	Mass (M_⊕)	Radius (R_⊕)	Density (g/cm³)	Flux (F_⊕)	T_eq (K)	Period (days)	Distance (ly)	Refs/notes
Earth (reported for reference)	Sun	G2V	1.00	1.00	5.514	1.00	255	365.25	0	Only planet confirmed to support life
Venus (reported for reference)	Sun	G2V	0.815	0.950	5.243	1.911	244.261	224.70	0.0000042
Mars (reported for reference)	Sun	G2V	0.107	0.533	3.934	0.431	209.8	686.98	0.0000058–0.000042
Gliese 180 c	Gliese 180	M2V	≥6.40	—	—	0.78	239	24.3	39
HD 40307 g	HD 40307	K2V	≥7.09	—	—	0.67	226	197.8	42
Kepler-452b	Kepler-452	G2V	~5	1.63	—	1.11	261	384.8	1799
KOI-4878.01	KOI-4878	F8V	~1.9+1.1 −0.5	1.05	—	1.04+1.1 −0.34	257	449.0	1,075
KOI-5715.01	KOI-5715	K3V	—	1.93			260	190	2,964
Lacaille 9352 d	Lacaille 9352	M0V	≥8.3	—	—			50.7	10.7
LTT 1445 Ad	LTT 1445A	M2V	≥2.72	—	—	—		24.3	22.4
Tau Ceti f	Tau Ceti	G8V	≥3.93	—	—	0.27	190	642	11.9	Has been only in HZ for less than 1 Gya
TOI-715.02	TOI-715	M4V		1.066±0.092		0.48+0.12 −0.17		25.6	137
WD 1054–226 b	WD 1054–226	DAZ	~1	—	—			1.04	118	The surface temperature might be high enough for habitability

Previous candidates

Some habitable exoplanets detected by radial velocity were considered as stellar artifacts by some studies. These include Gliese 581 d and g, Gliese 667 Ce and f, Gliese 682 b and c, Kapteyn b, Gliese 229 Ac, HD 85512 b and Gliese 832 c.

Several other planets, such as Gliese 180 b, also appear to be examples of planets once considered potentially habitable but later found to be interior to the habitable zone. Similarly, Tau Ceti e, HD 85512 b and Kepler-69c were thought to be likely habitable, but with improved models of the circumstellar habitable zone, PHL does not consider it potentially habitable.^{[failed verification]} Kepler-438b was also initially considered potentially habitable; however, it was later found to be a subject of powerful flares that can strip a planet of its atmosphere, so it is now considered non-habitable.

K2-3d and K2-18b were originally considered potentially habitable, and the latter remains listed in the HWC, but recent studies have shown them to be gaseous sub-Neptune rather than being the Hycean planet and thus unlikely to be habitable.

Kepler-1638b was thought to be a possibly habitable planet with a radius smaller than 2 R_🜨 after the validation. However based on the later measurement of host star parallax by Gaia, the radius of the planet was revised upward to 3.226+0.201
−0.315 R_🜨, meaning it is more likely an ice giant like Neptune with poor prospect for habitability.

KOI-1686.01 was also considered a potentially habitable exoplanet after its detection in 2011, until proven a false positive by NASA in 2015. Several other KOIs, like Kepler-577b and Kepler-1649b, were considered potentially habitable prior to confirmation, but with new data are no longer considered habitable.

TRAPPIST-1 d was considered to be potentially habitable until JWST/NIRSpec data found little evidence for an atmosphere with Earth-like surface pressure, highly likely ruling out habitability.

Main list

Current candidates

Previous candidates

See also