Exoplanet
18 Del b
248.6 light-years
- Discovery
- Radial Velocity · 2008
- Radius
- 12.5 Earth radii
- Mass
- 2,926.2461 (+50.8525 / −24.4728) Earth masses
- Orbital period
- 982.85 (+1.06 / −0.92) days
- Semi-major axis
- 2.476 (+2 × 10⁻³ / −2 × 10⁻³) AU
- Equilibrium temperature
- 452.72 K
- Mass provenance
- Msini
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