Exoplanet
Kepler-166 d
1,968.45 light-years
- Discovery
- Transit · 2016
- Radius
- 1.73 (+0.15 / −0.1) Earth radii
- Mass
- 3.64 Earth masses
- Orbital period
- 1.554 (+1.435 × 10⁻⁶ / −1.435 × 10⁻⁶) days
- Semi-major axis
- 0.0245 (+2.7 × 10⁻⁴ / −2.7 × 10⁻⁴) AU
- Equilibrium temperature
- 1,313 K
- Mass provenance
- M-R relationship
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