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Kepler-51 d is a Gas Giant exoplanet (a massive planet composed primarily of hydrogen and helium), about 9.7 times the radius of Earth. It has an equilibrium temperature of 381 K (108°C). The planet completes one orbit around its star every 130.2 Earth days. It was discovered in 2014 using the transit method. It orbits the star Kepler-51, located approximately 784 parsecs (2557 light-years) from Earth.
2014
Discovered
7.6
Earth Masses
9.70
Earth Radii
381
Temperature (K)
Discovery Information
Discovery MethodTransit
Discovery Year2,014
Discovery FacilityKepler
Orbital Properties
Orbital Period130.194 days
Semi-Major Axis0.509 AU
Eccentricity0.008
Physical Properties
Mass (Jupiter)0.024 MJ
Mass (Earth)7.6 M⊕
Radius (Jupiter)0.865 RJ
Radius (Earth)9.7 R⊕
Density0.046 g/cm3
Eq. Temperature381 K
Planetary Extremes
Where Kepler-51 d sits on the spectrum of all known exoplanets.
Mass7.6 M⊕
FeatherweightColossus
Radius9.70 R⊕
TinyEnormous
Temperature381 K
FrozenInferno
Year Length130.2 days
LightningGlacial
Density0.05 g/cm³
FluffyIron-dense
Star Distance0.509 AU
ScorchedFrozen exile
Star System View
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Size Comparison
9.70x Earth's radius (0.87x Jupiter)
Orbit Comparison
Earth: 365.25 days (1 AU)Kepler-51 d: 130.2 Earth days (0.509 AU)
Host Star: Kepler-51
Effective Temperature6,018 K
Mass1.04 M☉
Radius0.94 R☉
Size vs Sun1.06x smaller
Distance (pc)783.831 pc
Distance (ly)2556.5 light-years
What If You Lived Here?
5.7 kg
Your weight (from 70 kg)
0.08g
Near-Weightless
You'd float with every step. A gentle push sends you soaring.
130.2 Earth days
Year length
Unknown sunrise
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