The star
The star
Gaia-5
- Type
- red dwarf
- Surface
- ≈ 3,447 K
- Size
- 0.34 × the Sun
- Mass
- 0.34 × the Sun
- Brightness
- 0.0149 × the Sun
- Habitable zone
- 0.1–0.26 AU
The planets
Gaia-5
Gaia-5 b
- Year
- 358.62 days
- Distance from star
- 0.689 AU
- Mass
- 21 Jupiters
- Size
- 12 × Earth
- Found
- 2025, astrometry (European Space Agency (ESA) Gaia Satellite)
Masses found by the wobble method are minimums, because the orbit's tilt is unknown. Temperatures are equilibrium estimates for a bare planet, before any atmosphere.
How we know
The star's drift
The planet pulls the star in a tiny loop across the sky, measured against background stars over many years.
Sources
- Planet and star parameters: NASA Exoplanet Archive, Planetary Systems Composite Parameters, retrieved 1 Nov 2026. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.
- Position: HYG Database v4.1 (CC BY-SA 4.0).
- Habitable zone: a simple estimate from the star's brightness (√L × 0.95 to 1.67 AU), shown as a guide.