Exoplanet
WASP-138 b
1,351.05 light-years
- Discovery
- Transit · 2016
- Radius
- 12.2178 (+0.5605 / −0.5605) Earth radii
- Mass
- 387.7526 (+25.4264 / −25.4264) Earth masses
- Orbital period
- 3.6344 (+5 × 10⁻⁶ / −5 × 10⁻⁶) days
- Semi-major axis
- 0.0494 (+7 × 10⁻⁴ / −7 × 10⁻⁴) AU
- Equilibrium temperature
- 1,590 (+31 / −31) 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