K2-21 · M0.0
K2-21 c
Rank #499 of the ranked catalogue · Discovered by Transit in 2015
HZ 0%inferred
0.114
Earth-2.0 index
0.564
Earth Similarity Index
0%
Habitable-zone probability
2.49 R⊕
Radius
Planet
Mass6.760 M⊕inferred
Bulk density5.400 g/cm³
Orbital period15.5019 days
Semi-major axis0.10700 au
Eccentricity0.210
Incident flux5.100 S⊕
Equilibrium temperature382.0 K
Transit-time σ at 2030475.7 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation1.28 masReflected-light contrast 9.40e-8 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 coverage75%0% median composite-to-default difference over shared parameters.
Host star & system
HostK2-21
Spectral typeM0.0
Effective temperature4222 K
Radius0.647 R☉
Mass0.676 M☉
Distance83.6 pc / 272.8 ly
DiscoveryTransit, 2015