K2-138 · G8 V
K2-138 b
Rank #2622 of the ranked catalogue · Discovered by Transit in 2017
HZ 0%measured
0.091
Earth-2.0 index
0.208
Earth Similarity Index
0%
Habitable-zone probability
1.51 R⊕
Radius
Planet
Mass3.100 M⊕measured
Bulk density4.900 g/cm³
Orbital period2.3531 days
Semi-major axis0.03385 au
Eccentricity0.048
Incident flux486.000 S⊕
Equilibrium temperature1193.5 K
Transit-time σ at 2030636.8 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation0.17 masReflected-light contrast 3.45e-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