Exoplanet CatalogExoplanet HD 209458 b
Radius15.58 R⊕Earth = 1
Mass232.0 M⊕Earth = 1
Orbital period3.52 d
Equilibrium temp.1,459 K≈ 1,186 °C
Distance157.5 ly
Discovered1999Radial Velocity
Size compared (radius, Earth = 1)
1.00
3.88
11.21
15.58
Where it sits among all planets (percentile)
97%
77%
18%
89%
15%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of HD 209458 (1)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| HD 209458 b | 3.52 | 15.58 | 232.0 | 1,459 | 1999 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| HD 209458 | G0 V | 6,091 | 1.19 | 1.23 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.