Kepler-18
Kepler-18 b
Rank #2508 of the ranked catalogue · Discovered by Transit in 2011
HZ 0%measured
0.092
Earth-2.0 index
0.213
Earth Similarity Index
0%
Habitable-zone probability
2.00 R⊕
Radius
Planet
Mass6.900 M⊕measured
Bulk density4.900 g/cm³
Orbital period3.5047 days
Semi-major axis0.04470 au
Eccentricity0.000
Incident flux355.735 S⊕
Equilibrium temperature1103.9 K
Transit-time σ at 203086.7 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation0.10 masReflected-light contrast 3.47e-7 at Aᵍ = 0.30 and Lambertian quadrature.
Composite parameter sources4 · mixedThe archive may select different publications for different parameters; mixed-source is disclosed, not automatically penalised.
Default-solution coverage83%0% median composite-to-default difference over shared parameters.
Host star & system
HostKepler-18
Spectral typeG
Effective temperature5345 K
Radius1.108 R☉
Mass0.972 M☉
Distance433.0 pc / 1412.4 ly
DiscoveryTransit, 2011