K2-138 · G8 V
K2-138 f
Rank #2248 of the ranked catalogue · Discovered by Transit in 2017
HZ 0%measured
0.094
Earth-2.0 index
0.228
Earth Similarity Index
0%
Habitable-zone probability
2.90 R⊕
Radius
Planet
Mass1.630 M⊕measured
Bulk density0.400 g/cm³
Orbital period12.7576 days
Semi-major axis0.10447 au
Eccentricity0.062
Incident flux51.000 S⊕
Equilibrium temperature679.3 K
Transit-time σ at 2030268.6 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation0.52 masReflected-light contrast 1.34e-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