Exoplanet CatalogExoplanet Proxima Cen b
Radius1.02 R⊕Earth = 1
Mass1.1 M⊕Earth = 1
Orbital period11.18 d
Equilibrium temp.218 K≈ -55 °C
Distance4.2 ly
Discovered2016Radial Velocity
Size compared (radius, Earth = 1)
1.00
1.02
3.88
11.21
Where it sits among all planets (percentile)
4%
4%
51%
6%
0%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of Proxima Cen (2)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| Proxima Cen d | 5.12 | 0.69 | 0.3 | 282 | 2025 |
| Proxima Cen b | 11.18 | 1.02 | 1.1 | 218 | 2016 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| Proxima Cen | M5.5 V | 2,900 | 0.14 | 0.12 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.