K2-21 · M0.0
K2-21 b
Rank #552 of the ranked catalogue · Discovered by Transit in 2015
HZ 0%inferred
0.113
Earth-2.0 index
0.542
Earth Similarity Index
0%
Habitable-zone probability
1.84 R⊕
Radius
Planet
Mass4.040 M⊕inferred
Bulk density2.700 g/cm³
Orbital period9.3250 days
Semi-major axis0.07600 au
Eccentricity0.100
Incident flux10.000 S⊕
Equilibrium temperature452.0 K
Transit-time σ at 2030343.0 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation0.91 masReflected-light contrast 1.02e-7 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