Exoplanet
GJ 3998 b
59.18 light-years
- Discovery
- Radial Velocity · 2016
- Radius
- 1.39 Earth radii
- Mass
- 2.5 (+0.3 / −0.29) Earth masses
- Orbital period
- 2.6503 (+2.2 × 10⁻⁴ / −1.9 × 10⁻⁴) days
- Semi-major axis
- 0.03 (+1 × 10⁻³ / −1 × 10⁻³) AU
- Equilibrium temperature
- 733.5 (+40.91 / −40.91) 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