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K2-157 b is a Rocky exoplanet (a small, dense world with a solid surface), roughly the same size as Earth at 0.94 Earth radii. Its scorching equilibrium temperature of 2432 K (2159°C) makes it far too hot for liquid water. The planet completes one orbit around its star every 8.8 hours. It was discovered in 2018 using the transit method. It orbits the G-type star K2-157, located approximately 298 parsecs (973 light-years) from Earth.
2018
Discovered
1.1
Earth Masses
0.94
Earth Radii
2432
Temperature (K)
Discovery Information
Discovery MethodTransit
Discovery Year2,018
Discovery FacilityK2
Orbital Properties
Orbital Period0.3653 days
Semi-Major Axis0.0096 AU
Inclination89.2 deg
Physical Properties
Mass (Jupiter)0.0036 MJ
Mass (Earth)1.14 M⊕
Radius (Jupiter)0.0834 RJ
Radius (Earth)0.935 R⊕
Density7.7 g/cm3
Eq. Temperature2,432 K
Insolation Flux6,660 S⊕
Planetary Extremes
Where K2-157 b sits on the spectrum of all known exoplanets.
Mass1.1 M⊕
FeatherweightColossus
Radius0.94 R⊕
TinyEnormous
Temperature2432 K
FrozenInferno
Year Length8.8 hrs
LightningGlacial
Density7.70 g/cm³
FluffyIron-dense
Star Distance9.6e-3 AU
ScorchedFrozen exile
Star System View
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Size Comparison
0.94x Earth's radius
Orbit Comparison
Earth: 365.25 days (1 AU)K2-157 b: 8.8 hours (0.010 AU)
Host Star: K2-157
Spectral TypeG9 V
Effective Temperature5,334 K
Mass0.89 M☉
Radius0.86 R☉
Size vs Sun1.16x smaller
Metallicity [Fe/H]0.02
Distance (pc)298.373 pc
Distance (ly)973.2 light-years
Planets in the K2-157 System
What If You Lived Here?
91.3 kg
Your weight (from 70 kg)
1.30g
Heavy
Every step takes effort. Climbing stairs is exhausting.
8.8 hours
Year length
Yellow sunrise
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