TOI-257
TOI-257 b
Rank #3896 of the ranked catalogue · Discovered by Transit in 2021
HZ 0%measured
0.081
Earth-2.0 index
0.149
Earth Similarity Index
0%
Habitable-zone probability
7.16 R⊕
Radius
Planet
Mass43.860 M⊕measured
Bulk density0.650 g/cm³
Orbital period18.3882 days
Semi-major axis0.15280 au
Eccentricity0.000
Incident flux186.000 S⊕
Equilibrium temperature938.7 K
Transit-time σ at 2030274.2 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation1.99 masReflected-light contrast 3.81e-7 at Aᵍ = 0.30 and Lambertian quadrature.
Composite parameter sources2 · mixedThe archive may select different publications for different parameters; mixed-source is disclosed, not automatically penalised.
Default-solution coverage100%0% median composite-to-default difference over shared parameters.
Host star & system
HostTOI-257
Spectral typeF
Effective temperature6095 K
Radius1.867 R☉
Mass1.407 M☉
Distance76.9 pc / 250.8 ly
DiscoveryTransit, 2021