K2-18
K2-18 is an M2.5 V star 124 light years away with 2 known planets. The first was found in 2015 and the latest in 2017.
Open in 3DPlanets
| Planet | Orbital period | Distance from star | Radius (Earths) | Mass (Earths) | Found | Method |
|---|---|---|---|---|---|---|
| K2-18 c (disputed) | 8.962 days | 0.06 AU | at least 7.51 | 2017 | Radial Velocity | |
| K2-18 b | 32.94 days | 0.1429 AU | 2.37 | 8.92 | 2015 | Transit |
"At least" is a minimum mass. Radial velocity can only measure mass times the sine of the orbit's tilt.
Star
- Spectral type M2.5 V
- 3,457 K surface temperature
- 0.359 times the mass of the Sun
- 0.411 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.