Exoplanet
TRAPPIST-1 h
40.54 light-years
- Discovery
- Transit · 2017
- Radius
- 0.755 (+0.014 / −0.014) Earth radii
- Mass
- 0.326 (+0.02 / −0.02) Earth masses
- Orbital period
- 18.7729 (+2.14 × 10⁻⁴ / −2.14 × 10⁻⁴) days
- Semi-major axis
- 0.0619 (+5.3 × 10⁻⁴ / −5.3 × 10⁻⁴) AU
- Equilibrium temperature
- 171.7 (+1.7 / −1.7) 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