Kepler-18 c
Orbiting Kepler-18
Kepler-18 c is an exoplanet orbiting the star Kepler-18, discovered in 2011 using the Transit method. It is a Neptune-sized world.
Radius
5.49
Earth radii
Mass
17.30
Earth masses
Orbital Period
7.6
days
Distance
433.0
parsecs
Radius (Earth radii)
5.49
Mass (Earth masses)
17.30
Measured
Equilibrium Temperature
Unknown
Parameter source: Cochran et al. 2011
Orbital Period
7.642+0.000−0.000days
Semi-Major Axis
0.0752+0.0011−0.0011au
Planet Mass (Earth masses)
17.30+1.90−1.90
Planet Mass (Jupiter masses)
0.0540+0.0060−0.0060
Eccentricity
0.0000
Radial Velocity Semi-Amplitude
5.10+1.90−1.90m/s
Distance from Earth
433.0 pc (~1412 ly)
Spectral Type
Unknown
Temperature
5345 K
Mass (Solar)
0.97 M☉
Radius (Solar)
1.11 R☉
Luminosity
-0.03 log L☉
Planets in System
3
Stars in System
1
Coordinates (RA, Dec)
298.0794°, 44.7462°
Discovery Method
Transit
Discovery Year
2011
Source ID: Kepler-18 c
Kepler-18 c orbits Kepler-18 and was reported in 2011 and was detected with the Transit method.
Published measurements list a radius of 5.49 Earth radii, a mass of 17.3 Earth masses, and an orbital period of 7.64 days.
Catalog data places the system at about 433 parsecs from Earth 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 Kepler-18More planets in this system