HD 128311
HD 128311 is a K0 star 53.3 light years away with 2 known planets. The first was found in 2002 and the latest in 2005.
Open in 3DPlanets
| Planet | Orbital period | Distance from star | Radius (Earths) | Mass (Earths) | Found | Method |
|---|---|---|---|---|---|---|
| HD 128311 b | 453 days | 1.084 AU | at least 562.2 | 2002 | Radial Velocity | |
| HD 128311 c | 2.523 years | 1.74 AU | 1,204 | 2005 | 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 K0
- 4,965 K surface temperature
- 0.828 times the mass of the Sun
- 0.76 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.