Finding Earth 2.0
HIP 81991 · G8 V

HIP 81991 b

Rank #1662 of the ranked catalogue · Discovered by Radial Velocity in 2026

HZ 0%measured

0.099

Earth-2.0 index

0.325

Earth Similarity Index

0%

Habitable-zone probability

12.50 R⊕

Radius

Planet

Mass3019.370 M⊕measured
Bulk density8.490 g/cm³
Orbital period5860.0000 days
Semi-major axis6.40000 au
Eccentricity
Incident flux0.118 S⊕
Equilibrium temperature149.1 K
Maximum angular separation145.78 masReflected-light contrast 6.62e-10 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 coverage55%0% median composite-to-default difference over shared parameters.

Host star & system

HostHIP 81991
Spectral typeG8 V
Effective temperature5100 K
Radius2.821 R☉
Mass1.090 M☉
Distance43.9 pc / 143.2 ly
DiscoveryRadial Velocity, 2026