Habitable Exoplaneten

Habitable Exoplaneten

Current Number of Potentially Habitable Exoplanets
Subterran
(Mars-size)
Terran
(Earth-size)
Superterran
(Super-Earth)
Total
0 11 21 32
subterran0.1 — 0.5 ME or 0.4 — 0.8 RE, terran0.5 — 5 ME or 0.8 — 1.5 RE, superterran5 — 10 ME or 1.5 — 2.5 REME = Earth masses, and RE = Earth radii.
 

Conservative Sample of Potentially Habitable Exoplanets


These exoplanets are more likely to have a rocky composition and maintain surface liquid water (i.e. 0.5 < Planet Radius ≤ 1.5 Earth radii or 0.1 < Planet Minimum Mass ≤ 5 Earth masses, and the planet is orbiting within the conservative habitable zone).

Name Type Mass
(ME)
Radius
(RE)
Flux
(SE)
Teq
(K)
Period
(days)
Distance
(ly)
ESI
001. GJ 667C c M-Warm Terran ≥ 3.8 1.1 - 1.5 - 2.0 0.88 247 28.1 24 0.84
002. Kepler-442 b K-Warm Terran 8.2 - 2.3 - 1.0 1.3 0.70 233 112.3 1115 0.84
003. GJ 667C f* M-Warm Terran ≥ 2.7 1.0 - 1.4 - 1.8 0.56 221 39.0 24 0.77
004. Wolf 1061 c (N) M-Warm Terran ≥ 4.3 1.1 - 1.6 - 2.0 0.60 223 17.9 14 0.76
005. Kapteyn b* M-Warm Terran ≥ 4.8 1.2 - 1.6 - 2.1 0.43 205 48.6 13 0.67
006. Kepler-62 f K-Warm Terran 10.2 - 2.8 - 1.2 1.4 0.39 201 267.3 1200 0.67
007. Kepler-186 f M-Warm Terran 4.7 - 1.5 - 0.6 1.2 0.29 188 129.9 561 0.61
008. GJ 667C e* M-Warm Terran ≥ 2.7 1.0 - 1.4 - 1.8 0.30 189 62.2 24 0.60
                 

* planet canditate/unconfirmed, (N) = new addition to the catalog

 
 
 

 

 

 

 

 

 

 

 

 

 


Optimistic Sample of Potentially Habitable Exoplanets


These exoplanets are less likely to have a rocky composition or maintain surface liquid water (i.e. 1.5 < Planet Radius ≤ 2.5 Earth radii or 5 < Planet Minimum Mass ≤ 10 Earth masses, or the planet is orbiting within the optimistic habitable zone).
 
Name Type Mass
(ME)
Radius
(RE)
Flux
(SE)
Teq
(K)
Period
(days)
Distance
(ly)
ESI
001. Kepler-438 b M-Warm Terran 4.0 - 1.3 - 0.6 1.1 1.38 276 35.2 473 0.88
002. Kepler-296 e M-Warm Terran 12.5 - 3.3 - 1.4 1.5 1.22 267 34.1 737 0.85
003. Kepler-62 e K-Warm Superterran 18.7 - 4.5 - 1.9 1.6 1.10 261 122.4 1200 0.83
004. Kepler-452 b G-Warm Superterran 19.8 - 4.7 - 1.9 1.6 1.11 261 384.8 1402 0.83
005. GJ 832 c M-Warm Superterran ≥ 5.4 1.2 - 1.7 - 2.2 1.00 253 35.7 16 0.81
006. K2-3 d M-Warm Terran 11.1 1.5 1.46 280 44.6 137 0.80
007. Kepler-283 c K-Warm Superterran 35.3 - 7.0 - 2.8 1.8 0.90 248 92.7 1741 0.79
008. tau Cet e* G-Warm Terran ≥ 4.3 1.1 - 1.6 - 2.0 1.51 282 168.1 12 0.78
009. GJ 180 c* M-Warm Superterran ≥ 6.4 1.3 - 1.8 - 2.3 0.79 239 24.3 38 0.77
010. Kepler-440 b K-Warm Superterran 41.2 - 7.7 - 3.1 1.9 1.43 273 101.1 851 0.75
011. GJ 180 b* M-Warm Superterran ≥ 8.3 1.3 - 1.9 - 2.4 1.23 268 17.4 38 0.75
012. GJ 163 c M-Warm Superterran ≥ 7.3 1.3 - 1.8 - 2.4 1.40 277 25.6 49 0.75
013. HD 40307 g* K-Warm Superterran ≥ 7.1 1.3 - 1.8 - 2.3 0.68 227 197.8 42 0.74
014. K2-18 b M-Warm Superterran ? - 16.5 - 6.0 2.2 0.94 251 32.9 111 0.73
015. Kepler-61 b K-Warm Superterran ? - 13.8 - 5.2 2.2 1.27 267 59.9 1063 0.73
016. Kepler-443 b K-Warm Superterran ? - 19.5 - 7.0 2.3 0.89 247 177.7 2540 0.71
017. Kepler-22 b G-Warm Superterran ? - 20.4 - 7.2 2.4 1.11 261 289.9 619 0.71
018. GJ 422 b* M-Warm Superterran ≥ 9.9 1.4 - 2.0 - 2.6 0.68 231 26.2 41 0.71
019. GJ 3293 c* M-Warm Superterran ≥ 8.6 1.4 - 1.9 - 2.5 0.60 223 48.1 59 0.70
020. Kepler-298 d K-Warm Superterran ? - 26.8 - 9.1 2.5 1.29 271 77.5 1545 0.68
021. Kepler-174 d K-Warm Superterran ? - 14.8 - 5.5 2.2 0.43 206 247.4 1174 0.61
022. Kepler-296 f M-Warm Superterran 28.7 - 6.1 - 2.5 1.8 0.34 194 63.3 737 0.60
023. GJ 682 c* M-Warm Superterran ≥ 8.7 1.4 - 1.9 - 2.5 0.37 198 57.3 17 0.59
024. KOI-4427 b* M-Warm Superterran 38.5 - 7.4 - 3.0 1.8 0.24 179 147.7 782 0.52
                 

* planet canditate/unconfirmed, (N) = new addition to the catalog

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tables Legend


  • Name - Name of the planet. This links to the data of the planet at the Extrasolar Planets Encyclopaedia or NASA Exoplanet Archive.
  • Type - PHL's classification of planets that includes host star spectral type (F, G, K, M), habitable zone location (hot, warm, cold) and size (miniterran, subterran, terran, superterran, jovian, neptunian) (e.g. Earth = G-Warm Terran, Venus = G-Hot Terran, Mars = G-Warm Subterran).
  • Mass - Minimum mass of the planet in Earth masses (Earth = 1.0 ME). Estimated for a pure iron, rocky, and water composition, respectively, when not available. 
  • Radius - Radius of planet in Earth radii (Earth = 1.0 RE). Estimated for a pure iron, rocky, and water composition, respectively, when not available.
  • Flux - Average stellar flux of the planet in Earth fluxes (Earth = 1.0 SE).
  • Teq - Equilibrium temperature in kelvins (K) assuming a 0.3 bond albedo (Earth = 255 K). Actual surface temperatures are expected to be larger than the equilibrium temperature depending on the atmosphere of the planets, which are currently unknown (e.g. Earth mean global surface temperature is about 288 K or 15°C).
  • Period - Orbital period in days (Earth = 365 days).
  • Distance - Distance from Earth in light years (ly).
  • ESI - Earth Similarity Index, a measure of similarity to Earth that summarizes how similar are these planets to the stellar flux, mass, and radius of Earth (Earth = 1.0). Results are sorted by this number. Planets more similar to Earth based on only these parameters are not necessarily more habitable

DATA from PHL

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