K2-21
K2-21 is an M0.0 star 273 light years away with 2 known planets. They were all found in 2015.
Open in 3DPlanets
| Planet | Orbital period | Distance from star | Radius (Earths) | Mass (Earths) | Found | Method |
|---|---|---|---|---|---|---|
| K2-21 b | 9.325 days | 0.076 AU | 1.84 | 2015 | Transit | |
| K2-21 c | 15.5 days | 0.107 AU | 2.49 | 2015 | Transit |
Star
- Spectral type M0.0
- 4,222 K surface temperature
- 0.676 times the mass of the Sun
- 0.6468 times the radius of the Sun
Data from the NASA Exoplanet Archive, as of October 3, 2026. In the 3D view sizes and distances are compressed and every orbit is drawn in the same plane. Where each planet sits along its orbit is made up.