Information on HD209458

The star

Name of the star
HD 209458
Coordinates (J2000)
R.A: 22h 03m 10.8s 
Dec: +18d 53m 04s 
Constellation
Pegasus
Distance to the Earth
46 parsecs
150 light-years
Spectral type
F8-G0V
Description
Solar type star
Effective temperature
6000°C
Visual magnitude
7.65
Mass
1.05 solar mass
Stellar radius
1.15 solar radius
Age of the star
5.2 billion years

Information on the planet

Name of the planet
HD 209458 b
Detection method
Radial velocity search
Eccentricity
<0.04
Orbital period
3.524738 ± 0.000015 days
Transit duration
3 hours
Distance to the star
0.047 AU
7 millions of kilometers
Inclination
86.6°
Planetary radius
1.35 ± 0.04 Jupiter radius
(~ 96500 km)
Planetary mass
0.69 Jupiter mass
(~ 220 Earth mass)
Planet density
0.35
Roche lobe size
2.7 HD209458b radii
3.6 Jupiter radii