Finding Earth 2.0
Kepler-257

Kepler-257 c

Rank #4344 of the ranked catalogue · Discovered by Transit in 2014

HZ 0%inferred

0.076

Earth-2.0 index

0.195

Earth Similarity Index

0%

Habitable-zone probability

5.41 R⊕

Radius

Planet

Mass25.200 M⊕inferred
Bulk density0.875 g/cm³
Orbital period6.5815 days
Semi-major axis0.06600 au
Eccentricity0.000
Incident flux88.600 S⊕
Equilibrium temperature779.9 K
Transit-time σ at 203013.2 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation0.09 masReflected-light contrast 1.17e-6 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