Exoplanet CatalogExoplanet K2-18 b
Radius2.37 R⊕Earth = 1
Mass8.9 M⊕Earth = 1
Orbital period32.94 d
Equilibrium temp.284 K≈ 11 °C
Distance124.0 ly
Discovered2015Transit
Size compared (radius, Earth = 1)
1.00
2.37
3.88
11.21
Where it sits among all planets (percentile)
38%
49%
73%
10%
11%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of K2-18 (2)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| K2-18 c | 8.96 | 2.65 | 7.5 | 363 | 2017 |
| K2-18 b | 32.94 | 2.37 | 8.9 | 284 | 2015 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| K2-18 | M2.5 V | 3,457 | 0.41 | 0.36 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.