Exoplanet CatalogExoplanet K2-9 b
Radius2.25 R⊕Earth = 1
Mass5.7 M⊕Earth = 1
Orbital period18.45 d
Equilibrium temp.314 K≈ 41 °C
Distance270.6 ly
Discovered2015Transit
Size compared (radius, Earth = 1)
1.00
2.25
3.88
11.21
Where it sits among all planets (percentile)
34%
33%
63%
11%
23%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of K2-9 (1)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| K2-9 b | 18.45 | 2.25 | 5.7 | 314 | 2015 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| K2-9 | M2.5 V | 3,390 | 0.31 | 0.30 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.