K2-121
K2-121 b
Rank #2720 of the ranked catalogue · Discovered by Transit in 2017
HZ 0%measured
0.090
Earth-2.0 index
0.204
Earth Similarity Index
0%
Habitable-zone probability
7.16 R⊕
Radius
Planet
Mass51.000 M⊕measured
Bulk density0.700 g/cm³
Orbital period5.1857 days
Semi-major axis0.05250 au
Eccentricity0.220
Incident flux62.500 S⊕
Equilibrium temperature714.7 K
Transit-time σ at 203020.8 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation0.31 masReflected-light contrast 3.23e-6 at Aᵍ = 0.30 and Lambertian quadrature.
Composite parameter sources5 · mixedThe archive may select different publications for different parameters; mixed-source is disclosed, not automatically penalised.
Default-solution coverage83%0% median composite-to-default difference over shared parameters.
Host star & system
HostK2-121
Spectral typeK
Effective temperature4526 K
Radius0.675 R☉
Mass0.710 M☉
Distance169.4 pc / 552.5 ly
DiscoveryTransit, 2017