Exoplanet CatalogThe K2-21 system (2 planets)
Distance272.8 ly
Planets2
Spectral typeM0.0
Star Teff4,222 K
Orbital period (days)
9.33
15.50
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| K2-21 b | 9.33 | 1.84 | 4.0 | 500 | 2015 |
| K2-21 c | 15.50 | 2.49 | 6.8 | 420 | 2015 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.