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Public Universe

Exoplanet

HD 205739 b

301.72 light-years

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Discovery
Radial Velocity · 2008
Radius
13.6 Earth radii
Mass
435.41 (+22.25 / −28.6) Earth masses
Orbital period
279.8 (+0.1 / −0.1) days
Semi-major axis
0.896 (+0.019 / −0.015) AU
Equilibrium temperature
362.84 (+14.18 / −14.18) 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