HD 128311 c
A confirmed exoplanet orbiting HD 128311.
Compared with Earth
- Mass
- About 1,204 times Earth's mass.
- Year
- A year here lasts about 2.5 Earth years.
Planet
- Radius
- Unknown
- Mass
- 1,204 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 921.5 days
- Average distance from its star
- 1.74 AU
Star
- Host star
- HD 128311
- Spectral class
- Unknown
- Surface temperature
- Unknown
- Radius
- 0.76 × Sun
- Mass
- 0.828 × Sun
- Age
- 0.96 billion years
System
- Distance from Earth
- 53.26 light-years (16.33 parsecs)
- Stars in system
- 1
- Known planets
- 2
Discovery
- Year
- 2005
- Method
- Radial Velocity
- Facility
- W. M. Keck Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.