Exoplanet CatalogExoplanet HD 128311 b
Radius13.50 R⊕Earth = 1
Mass562.2 M⊕Earth = 1
Orbital period453.02 d
Equilibrium temp.200 K≈ -73 °C
Distance53.3 ly
Discovered2002Radial Velocity
Size compared (radius, Earth = 1)
1.00
3.88
11.21
13.50
Where it sits among all planets (percentile)
88%
85%
90%
6%
4%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of HD 128311 (2)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| HD 128311 b | 453.02 | 13.50 | 562.2 | 200 | 2002 |
| HD 128311 c | 921.54 | 13.00 | 1,204.3 | 158 | 2005 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| HD 128311 | K0 | 4,965 | 0.76 | 0.83 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.