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Public Universe

Exoplanet

HD 102117 b

129.09 light-years

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Discovery
Radial Velocity · 2005
Radius
8.47 Earth radii
Mass
54.0311 (+3.1783 / −3.1783) Earth masses
Orbital period
20.8133 (+6.4 × 10⁻³ / −6.4 × 10⁻³) days
Semi-major axis
0.15 (+0 / −0) AU
Equilibrium temperature
780.86 (+6.72 / −6.72) K
Mass provenance
Msini

Measurements may come from different studies and need not form one self-consistent model. “Msini” is a minimum mass; a mass inferred from radius is an estimate. Equilibrium temperature is a model estimate, not a measured surface temperature or evidence of habitability.

NASA archive record and references ↗

Snapshot retrieved: 2026-10-11T04:15:07.688253+00:00