K2-18 c
Orbiting K2-18
K2-18 c is an exoplanet orbiting the star K2-18, discovered in 2017 using the Radial Velocity method.
Minimum Mass (M sin i)
7.51
Earth masses
Orbital Period
9.0
days
Distance
38.0
parsecs
Equilibrium Temp
363
K
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
7.51
Radial-velocity minimum
Equilibrium Temperature
363 K
Parameter source: Cloutier et al. 2017
Orbital Period
8.962+0.008−0.008days
Semi-Major Axis
0.0600+0.0030−0.0030au
M sin(i) (Earth masses)
7.51+1.33−1.33
M sin(i) (Jupiter masses)
0.0236+0.0042−0.0042
Eccentricity
<0.47
Radial Velocity Semi-Amplitude
4.63+0.72−0.72m/s
Distance from Earth
38.0 pc (~124 ly)
Spectral Type
Unknown
Temperature
3457 K
Mass (Solar)
0.36 M☉
Radius (Solar)
0.41 R☉
Luminosity
Unknown
Planets in System
2
Stars in System
1
Coordinates (RA, Dec)
172.5601°, 7.5878°
Discovery Method
Radial Velocity
Discovery Year
2017
Source ID: K2-18 c
K2-18 c orbits K2-18 and was reported in 2017 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 7.51 Earth masses (M sin i), an orbital period of 8.96 days, and an equilibrium temperature near 363 K.
Catalog data places the system at about 38 parsecs from Earth and 2 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open K2-18More planets in this system