K2-9 · M2.5 V
K2-9 b
Rank #357 of the ranked catalogue · Discovered by Transit in 2015
HZ 20%inferred
0.118
Earth-2.0 index
0.671
Earth Similarity Index
20%
Habitable-zone probability
2.25 R⊕
Radius
Planet
Mass5.690 M⊕inferred
Bulk density2.740 g/cm³
Orbital period18.4498 days
Semi-major axis0.09100 au
Eccentricity—
Incident flux1.360 S⊕
Equilibrium temperature274.5 K
Transit-time σ at 2030665.3 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation1.10 masReflected-light contrast 1.06e-7 at Aᵍ = 0.30 and Lambertian quadrature.
Composite parameter sources3 · mixedThe archive may select different publications for different parameters; mixed-source is disclosed, not automatically penalised.
Default-solution coverage82%0% median composite-to-default difference over shared parameters.
Host star & system
HostK2-9
Spectral typeM2.5 V
Effective temperature3390 K
Radius0.310 R☉
Mass0.300 M☉
Distance83.0 pc / 270.6 ly
DiscoveryTransit, 2015