K2-157 b
Orbiting K2-157
K2-157 b is an exoplanet orbiting the star K2-157, discovered in 2018 using the Transit method. It is a Earth-sized world.
Radius
0.94
Earth radii
Mass
1.14
Earth masses
Orbital Period
0.4
days
Distance
298.4
parsecs
Equilibrium Temp
2432
K
Radius (Earth radii)
0.94
Mass (Earth masses)
1.14
Measured
Equilibrium Temperature
2432 K
Parameter source: Castro-González et al. 2025
Orbital Period
0.365+0.000−0.000days
Semi-Major Axis
0.0096+0.0001−0.0001au
Planet Mass (Earth masses)
1.14+0.41−0.42
Planet Mass (Jupiter masses)
0.0036+0.0013−0.0013
Radial Velocity Semi-Amplitude
1.10+0.39−0.41m/s
Distance from Earth
298.4 pc (~973 ly)
Spectral Type
G9 V
Temperature
5334 K
Mass (Solar)
0.89 M☉
Radius (Solar)
0.86 R☉
Luminosity
Unknown
Planets in System
3
Stars in System
1
Coordinates (RA, Dec)
183.7515°, -5.7820°
Discovery Method
Transit
Discovery Year
2018
Source ID: K2-157 b
K2-157 b orbits K2-157 and was reported in 2018 and was detected with the Transit method.
Published measurements list a radius of 0.94 Earth radii, a mass of 1.14 Earth masses, an orbital period of 0.37 days, and an equilibrium temperature near 2,432 K.
Catalog data places the system at about 298.4 parsecs from Earth, a host star classified as G9 V, and 3 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open K2-157