WASP-21 b
Orbiting WASP-21
WASP-21 b is an exoplanet orbiting the star WASP-21, discovered in 2010 using the Transit method. It is a Jupiter-sized world.
Radius
11.99
Earth radii
Mass
95.34
Earth masses
Orbital Period
4.3
days
Distance
258.4
parsecs
Radius (Earth radii)
11.99
Mass (Earth masses)
95.34
Measured
Equilibrium Temperature
Unknown
Parameter source: Bouchy et al. 2010
Orbital Period
4.322+0.000−0.000days
Semi-Major Axis
0.0520+0.0004−0.0004au
Planet Mass (Earth masses)
95.34+3.50−3.50
Planet Mass (Jupiter masses)
0.3000+0.0110−0.0110
Eccentricity
0.0000
Radial Velocity Semi-Amplitude
37.20+1.10−1.10m/s
Distance from Earth
258.4 pc (~843 ly)
Spectral Type
G3 V
Temperature
Unknown
Mass (Solar)
Unknown
Radius (Solar)
Unknown
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
347.4928°, 18.3962°
Discovery Method
Transit
Discovery Year
2010
Source ID: WASP-21 b
WASP-21 b orbits WASP-21 and was reported in 2010 and was detected with the Transit method.
Published measurements list a radius of 11.99 Earth radii, a mass of 95.35 Earth masses, and an orbital period of 4.32 days.
Catalog data places the system at about 258.4 parsecs from Earth, a host star classified as G3 V, 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 WASP-21