Kepler-257
Kepler-257 d
Rank #2674 of the ranked catalogue · Discovered by Transit in 2014
HZ 0%inferred
0.091
Earth-2.0 index
0.314
Earth Similarity Index
0%
Habitable-zone probability
4.95 R⊕
Radius
Planet
Mass21.700 M⊕inferred
Bulk density0.983 g/cm³
Orbital period24.6645 days
Semi-major axis0.16000 au
Eccentricity0.000
Incident flux15.200 S⊕
Equilibrium temperature501.9 K
Transit-time σ at 203022.3 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation0.20 masReflected-light contrast 1.66e-7 at Aᵍ = 0.30 and Lambertian quadrature.
Composite parameter sources6 · mixedThe archive may select different publications for different parameters; mixed-source is disclosed, not automatically penalised.
Default-solution coverage50%0% median composite-to-default difference over shared parameters.
Host star & system
HostKepler-257
Spectral typeK
Effective temperature5180 K
Radius1.037 R☉
Mass0.916 M☉
Distance780.3 pc / 2544.9 ly
DiscoveryTransit, 2014