K2-138 · G8 V
K2-138 c
Rank #2465 of the ranked catalogue · Discovered by Transit in 2017
HZ 0%measured
0.092
Earth-2.0 index
0.216
Earth Similarity Index
0%
Habitable-zone probability
2.30 R⊕
Radius
Planet
Mass6.310 M⊕measured
Bulk density2.800 g/cm³
Orbital period3.5600 days
Semi-major axis0.04461 au
Eccentricity0.045
Incident flux279.000 S⊕
Equilibrium temperature1038.9 K
Transit-time σ at 2030231.2 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation0.22 masReflected-light contrast 4.61e-7 at Aᵍ = 0.30 and Lambertian quadrature.
Composite parameter sources5 · 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
HostK2-138
Spectral typeG8 V
Effective temperature5356 K
Radius0.863 R☉
Mass0.935 M☉
Distance202.6 pc / 660.7 ly
DiscoveryTransit, 2017