Exoplanet
TRAPPIST-1 b
40.54 light-years
- Discovery
- Transit · 2016
- Radius
- 1.116 (+0.014 / −0.012) Earth radii
- Mass
- 1.374 (+0.069 / −0.069) Earth masses
- Orbital period
- 1.5108 (+6 × 10⁻⁶ / −6 × 10⁻⁶) days
- Semi-major axis
- 0.0115 (+1 × 10⁻⁴ / −1 × 10⁻⁴) AU
- Equilibrium temperature
- 397.6 (+3.8 / −3.8) 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