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2017
Discovered
231.7
Earth Masses
16.02
Earth Radii
1623
Temperature (K)
Discovery Information
Discovery MethodTransit
Discovery Year2,017
Discovery FacilityMultiple Facilities
Orbital Properties
Orbital Period2.7165 days
Semi-Major Axis0.0391 AU
Eccentricity0.066
Inclination88.69 deg
Physical Properties
Mass (Jupiter)0.729 MJ
Mass (Earth)231.6981 M⊕
Radius (Jupiter)1.429 RJ
Radius (Earth)16.0177 R⊕
Density0.332 g/cm3
Eq. Temperature1,623 K
Planetary Extremes
Where WASP-81 b sits on the spectrum of all known exoplanets.
Mass231.7 M⊕
FeatherweightColossus
Radius16.02 R⊕
TinyEnormous
Temperature1623 K
FrozenInferno
Year Length2.7 days
LightningGlacial
Density0.33 g/cm³
FluffyIron-dense
Star Distance0.039 AU
ScorchedFrozen exile
Star System View
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Size Comparison
16.02x Earth's radius (1.43x Jupiter)
Orbit Comparison
Earth: 365.25 days (1 AU)WASP-81 b: 2.7 Earth days (0.039 AU)
Host Star: WASP-81
Effective Temperature5,870 K
Mass1.08 M☉
Radius1.283 R☉
Size vs Sun1.28x larger
Luminosity1.76 L☉
Luminosity vs Sun1.760x brighter
Metallicity [Fe/H]-0.36
Distance (pc)398.505 pc
Distance (ly)1299.7 light-years
What If You Lived Here?
63.2 kg
Your weight (from 70 kg)
0.90g
Earth-like
Feels just like home — comfortably familiar.
2.7 Earth days
Year length
Unknown sunrise
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