K2-138
K2-138 is a G8 V star 661 light years away with 6 known planets. The first was found in 2017 and the latest in 2021.
Open in 3DPlanets
| Planet | Orbital period | Distance from star | Radius (Earths) | Mass (Earths) | Found | Method |
|---|---|---|---|---|---|---|
| K2-138 b | 2.353 days | 0.03385 AU | 1.51 | 3.1 | 2017 | Transit |
| K2-138 c | 3.56 days | 0.04461 AU | 2.299 | 6.31 | 2017 | Transit |
| K2-138 d | 5.405 days | 0.05893 AU | 2.39 | 7.92 | 2017 | Transit |
| K2-138 e | 8.261 days | 0.0782 AU | 3.39 | 12.97 | 2017 | Transit |
| K2-138 f | 12.76 days | 0.1045 AU | 2.904 | 1.63 | 2017 | Transit |
| K2-138 g | 41.97 days | 0.2311 AU | 3.013 | 4.32 | 2021 | Transit |
Star
- Spectral type G8 V
- 5,356 K surface temperature
- 0.935 times the mass of the Sun
- 0.863 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.