Exoplanet
HD 209458 b
Orbiting HD 209458
Overview
HD 209458 b is an exoplanet orbiting the star HD 209458, discovered in 1999 using the Radial Velocity method. It is a Jupiter-sized world.
Key Measurements
Radius
15.58
Earth radii
015 R⊕
Mass
232.02
Earth masses
0500 M⊕
Orbital Period
3.5
days
0.1d10,000d
Distance
48.3
parsecs
Nearby10,000 pc
Radius (Earth radii)
15.58
Mass (Earth masses)
232.02
Measured
Equilibrium Temperature
Unknown
Orbital Period
3.52 days
Distance from Earth
48.3 pc (~158 ly)
Spectral Type
Unknown
Temperature
6091 K
Mass (Solar)
1.23 M☉
Radius (Solar)
1.19 R☉
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
330.7950°, 18.8842°
Discovery Method
Radial Velocity
Discovery Year
1999
Data Sources
Source ID: HD 209458 b