51 Peg b
A confirmed exoplanet orbiting 51 Peg.
Compared with Earth
- Mass
- About 194 times Earth's mass.
- Year
- A year here lasts about 4.2 Earth days.
Planet
- Radius
- Unknown
- Mass
- 193.9 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 4.231 days
- Average distance from its star
- 0.052 AU
Star
- Host star
- 51 Peg
- Spectral class
- G — sun-like
- Surface temperature
- 5,761 K
- Radius
- 1.19 × Sun
- Mass
- 1.07 × Sun
- Age
- Unknown
System
- Distance from Earth
- 50.43 light-years (15.46 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 1995
- Method
- Radial Velocity
- Facility
- Haute-Provence Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.