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Kepler-37 d is a Neptune-like exoplanet (an ice giant with a thick atmosphere), about 2.0 times the radius of Earth. It has an equilibrium temperature of 499 K (226°C). The planet completes one orbit around its star every 39.8 Earth days. It was discovered in 2013 using the transit method. It orbits the star Kepler-37, located approximately 64 parsecs (208 light-years) from Earth.
2013
Discovered
2.0
Earth Masses
2.03
Earth Radii
499
Temperature (K)
Discovery Information
Discovery MethodTransit
Discovery Year2,013
Discovery FacilityKepler
Orbital Properties
Orbital Period39.7923 days
Semi-Major Axis0.2109 AU
Eccentricity0.1
Inclination89.335 deg
Physical Properties
Mass (Jupiter)0.0063 MJ
Mass (Earth)2 M⊕
Radius (Jupiter)0.1811 RJ
Radius (Earth)2.03 R⊕
Density1.3 g/cm3
Eq. Temperature499 K
Insolation Flux10.39 S⊕
Planetary Extremes
Where Kepler-37 d sits on the spectrum of all known exoplanets.
Mass2.0 M⊕
FeatherweightColossus
Radius2.03 R⊕
TinyEnormous
Temperature499 K
FrozenInferno
Year Length39.8 days
LightningGlacial
Density1.30 g/cm³
FluffyIron-dense
Star Distance0.211 AU
ScorchedFrozen exile
Star System View
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Size Comparison
2.03x Earth's radius (0.18x Jupiter)
Orbit Comparison
Earth: 365.25 days (1 AU)Kepler-37 d: 39.8 Earth days (0.211 AU)
Host Star: Kepler-37
Mass0.8 M☉
Radius0.772 R☉
Size vs Sun1.30x smaller
Distance (pc)63.9207 pc
Distance (ly)208.5 light-years
What If You Lived Here?
34.0 kg
Your weight (from 70 kg)
0.49g
Feather-light
Walking feels like bounding on a trampoline.
39.8 Earth days
Year length
Unknown sunrise
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Related Research
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