K2-138 · G8 V
K2-138 e
Rank #1781 of the ranked catalogue · Discovered by Transit in 2017
HZ 0%measured
0.098
Earth-2.0 index
0.255
Earth Similarity Index
0%
Habitable-zone probability
3.39 R⊕
Radius
Planet
Mass12.970 M⊕measured
Bulk density1.800 g/cm³
Orbital period8.2615 days
Semi-major axis0.07820 au
Eccentricity0.077
Incident flux91.100 S⊕
Equilibrium temperature785.3 K
Transit-time σ at 2030182.5 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation0.39 masReflected-light contrast 3.26e-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