Exoplanet
HAT-P-9 b
1,484.67 light-years
- Discovery
- Transit · 2008
- Radius
- 15.6141 (+0.751 / −0.7286) Earth radii
- Mass
- 238.0547 (+20.3411 / −20.0233) Earth masses
- Orbital period
- 3.9228 (+1.02 × 10⁻⁶ / −1.02 × 10⁻⁶) days
- Semi-major axis
- 0.0529 (+7.8 × 10⁻⁴ / −7.8 × 10⁻⁴) AU
- Equilibrium temperature
- 1,540 (+32 / −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