Exoplanet
KELT-21 b
1,535.8 light-years
- Discovery
- Transit · 2018
- Radius
- 17.7775 (+0.4372 / −0.4484) Earth radii
- Mass
- < 1,242.7153 Earth masses
- Orbital period
- 3.6128 (+3.3 × 10⁻⁶ / −3.3 × 10⁻⁶) days
- Semi-major axis
- 0.0522 (+3.5 × 10⁻⁴ / −3.4 × 10⁻⁴) AU
- Equilibrium temperature
- 2,051 (+29 / −30) 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