Finding Earth 2.0
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