Exoplanet
HD 1666 b
384.56 light-years
- Discovery
- Radial Velocity · 2015
- Radius
- 12.7 Earth radii
- Mass
- 2,040 (+99 / −70) Earth masses
- Orbital period
- 270 (+0.8 / −0.9) days
- Semi-major axis
- 0.94 (+0.01 / −0.02) AU
- Equilibrium temperature
- 436.47 (+55.6 / −55.6) 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