Exoplanet CatalogExoplanet 51 Peg b
Radius14.10 R⊕Earth = 1
Mass193.9 M⊕Earth = 1
Orbital period4.23 d
Equilibrium temp.1,329 K≈ 1,056 °C
Distance50.4 ly
Discovered1995Radial Velocity
Size compared (radius, Earth = 1)
1.00
3.88
11.21
14.10
Where it sits among all planets (percentile)
94%
75%
25%
85%
4%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of 51 Peg (1)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| 51 Peg b | 4.23 | 14.10 | 193.9 | 1,329 | 1995 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| 51 Peg | G5V | 5,761 | 1.19 | 1.07 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.