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51 Peg b
Orbiting 51 Peg, discovered in 1995 (7500) by Haute-Provence Observatory via the Radial Velocity method.
Planet
| Radius | Unknown |
| Mass | 193.88 M⊕ |
| Orbital period | 4.23 Earth days (~0.0 Earth years) |
| Orbital eccentricity | 0.006 |
| Equilibrium temperature | Unknown |
Host star — 51 Peg
| Temperature | 5761 K (5488 °C) |
| Radius | 1.19 R☉ |
| Mass | 1.07 M☉ |
Location
| Distance from Earth | 15.5 pc (~50 light-years) |
| Right ascension / Declination | 344.3675 / 20.7691 |
Last refreshed 2026-09-14 from NASA's Exoplanet Archive.