Finding Earth 2.0
HD 216520 · K2

HD 216520 c

Rank #185 of the ranked catalogue · Discovered by Radial Velocity in 2020

HZ 0%M sin i

0.124

Earth-2.0 index

0.684

Earth Similarity Index

0%

Habitable-zone probability

3.03 R⊕

Radius

Planet

Mass9.440 M⊕M sin i
Bulk density1.860 g/cm³
Orbital period154.4300 days
Semi-major axis0.52800 au
Eccentricity0.120
Incident flux1.267 S⊕
Equilibrium temperature269.7 K
Maximum angular separation27.00 masReflected-light contrast 5.72e-9 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 coverage67%0% median composite-to-default difference over shared parameters.

Host star & system

HostHD 216520
Spectral typeK2
Effective temperature5103 K
Radius0.760 R☉
Mass0.820 M☉
Distance19.6 pc / 63.8 ly
DiscoveryRadial Velocity, 2020