Exoplanet
HD 21520 b
258.34 light-years
- Discovery
- Transit · 2024
- Radius
- 2.697 (+0.09 / −0.09) Earth radii
- Mass
- < 17.7 Earth masses
- Orbital period
- 25.1292 (+8.9 × 10⁻⁵ / −7.3 × 10⁻⁵) days
- Semi-major axis
- 0.1726 (+7.1 × 10⁻³ / −7.1 × 10⁻³) AU
- Equilibrium temperature
- 637 (+13 / −12) 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