Proxima Cen
Proxima Cen is an M5.5 V star 4.2 light years away with 2 known planets. The first was found in 2016 and the latest in 2025. It has 2 companion stars.
Open in 3DPlanets
| Planet | Orbital period | Distance from star | Radius (Earths) | Mass (Earths) | Found | Method |
|---|---|---|---|---|---|---|
| Proxima Cen d | 5.123 days | 0.02881 AU | at least 0.26 | 2025 | Radial Velocity | |
| Proxima Cen b | 11.18 days | 0.04848 AU | at least 1.055 | 2016 | Radial Velocity |
"At least" is a minimum mass. Radial velocity can only measure mass times the sine of the orbit's tilt.
Star
- Spectral type M5.5 V
- 2,900 K surface temperature
- 0.1221 times the mass of the Sun
- 0.141 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.