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Public Universe

Exoplanet

HD 156668 b

79.36 light-years

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Discovery
Radial Velocity · 2010
Radius
1.87 Earth radii
Mass
4.15 (+0.58 / −0.58) Earth masses
Orbital period
4.6455 (+1.1 × 10⁻³ / −1.1 × 10⁻³) days
Semi-major axis
0.05 (+7 × 10⁻⁴ / −7 × 10⁻⁴) AU
Equilibrium temperature
887.48 (+19.03 / −19.03) 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