Exoplanet CatalogExoplanet K2-138 b
Radius1.51 R⊕Earth = 1
Mass3.1 M⊕Earth = 1
Orbital period2.35 d
Equilibrium temp.1,157 K≈ 884 °C
Distance660.7 ly
Discovered2017Transit
Size compared (radius, Earth = 1)
1.00
1.51
3.88
11.21
Where it sits among all planets (percentile)
16%
17%
9%
78%
38%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of K2-138 (6)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| K2-138 b | 2.35 | 1.51 | 3.1 | 1,157 | 2017 |
| K2-138 c | 3.56 | 2.30 | 6.3 | 1,012 | 2017 |
| K2-138 d | 5.40 | 2.39 | 7.9 | 888 | 2017 |
| K2-138 e | 8.26 | 3.39 | 13.0 | 757 | 2017 |
| K2-138 f | 12.76 | 2.90 | 1.6 | 653 | 2017 |
| K2-138 g | 41.97 | 3.01 | 4.3 | 445 | 2021 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| K2-138 | G8 V | 5,356 | 0.86 | 0.94 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.