← Back to Exoplanet Archive
HD 128311 c
Orbiting HD 128311, discovered in 2005 (7510) by W. M. Keck Observatory via the Radial Velocity method.
Planet
| Radius | Unknown |
| Mass | 1204.26 M⊕ |
| Orbital period | 921.54 Earth days (~2.5 Earth years) |
| Orbital eccentricity | 0.159 |
| Equilibrium temperature | Unknown |
Host star — HD 128311
| Temperature | Unknown |
| Radius | 0.76 R☉ |
| Mass | 0.83 M☉ |
Location
| Distance from Earth | 16.3 pc (~53 light-years) |
| Right ascension / Declination | 219.0032 / 9.7454 |
Last refreshed 2026-09-14 from NASA's Exoplanet Archive.