CONFIRMED EXOPLANET
·
Gas Giant
HD 209458 b
Orbits Host Star: HD 209458
(Type G0 V)
· Distance: 157.500 Light-Years (48.302 pc)
Planetary Radius
15.581 R⊕
Planetary Mass
232.016 M⊕
Surface Gravity
0.96 g / g⊕
Equilibrium Temp
1459K (+1186°C / +2167°F)
Orbital Period
3.525 days
Discovery Year
1999 (Radial Velocity)
Habitability Assessment
⚠️ Thermal Exclusions: High equilibrium temperature (1459 K · +1186°C / +2167°F) places this world well interior to the runaway greenhouse threshold.
Discovery Facility: W. M. Keck Observatory.
NASA EXOPLANET ARCHIVE COMPOSITE PARAMETERS