XO-3 b
Orbiting XO-3
XO-3 b is an exoplanet orbiting the star XO-3, discovered in 2007 using the Transit method. It is a Jupiter-sized world.
Radius
14.80
Earth radii
Mass
4217.58
Earth masses
Orbital Period
3.2
days
Distance
213.1
parsecs
Equilibrium Temp
1890
K
Radius (Earth radii)
14.80
Mass (Earth masses)
4217.58
Measured
Equilibrium Temperature
1890 K
Parameter source: Rusznak et al. 2025
Orbital Period
3.192+0.000−0.000days
Semi-Major Axis
0.0481+0.0006−0.0006au
Planet Mass (Earth masses)
4217.58+111.24−114.42
Planet Mass (Jupiter masses)
13.2700+0.3500−0.3600
Eccentricity
0.2791+0.0024−0.0022
Argument of Periastron
-10.8+0.8−0.8deg
Radial Velocity Semi-Amplitude
1471.80+6.00−4.90m/s
Distance from Earth
213.1 pc (~695 ly)
Spectral Type
Unknown
Temperature
6970 K
Mass (Solar)
1.45 M☉
Radius (Solar)
1.52 R☉
Luminosity
0.69 log L☉
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
65.4696°, 57.8172°
Discovery Method
Transit
Discovery Year
2007
Source ID: XO-3 b
XO-3 b orbits XO-3 and was reported in 2007 and was detected with the Transit method.
Published measurements list a radius of 14.8 Earth radii, a mass of 4,217.58 Earth masses, an orbital period of 3.19 days, and an equilibrium temperature near 1,890 K.
Catalog data places the system at about 213.1 parsecs from Earth and 1 known planet in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open XO-3