Exoplanet
HD 219666 b
307.15 light-years
- Discovery
- Transit · 2018
- Radius
- 4.898 (+0.06 / −0.06) Earth radii
- Mass
- 17.6 (+1.2 / −1.2) Earth masses
- Orbital period
- 6.0345 (+4 × 10⁻⁶ / −4 × 10⁻⁶) days
- Semi-major axis
- 0.0636 (+2.65 × 10⁻³ / −2.65 × 10⁻³) AU
- Equilibrium temperature
- 1,076 (+22 / −22) K
- Mass provenance
- Mass
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