Gas giant · Gaia-4

Gaia-4 b

ExoplanetsDiscovered 2025

Scientific overview

Gaia-4 b is a gas giant orbiting Gaia-4, completing an orbit every 571 days, about 240 light-years from Earth. It was discovered in 2025 using the astrometry.

Host star

Gaia-4

Temperature

4,034 K

Mass

0.644 M☉

Discovery and detection

Detection method

Astrometry

Discovery year

2025

Discovered at

Gaia

Knowledge connections

OrbitsGaia-4
Discovered by methodAstrometry
Discovered by missionGaia
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Gas giant
Host star: Gaia-4
Discovery method: Astrometry
Discovery year: 2025
Orbital period: 571.3 d
Eccentricity: 0.338
Radius: 12.4 R⊕
Mass: 3750.38 M⊕
Density: 10.84 g/cm³ · derived
Distance: 240 ly

Density is derived from the archive mass and radius via ρ = M / (4⁄3·π·r³); all other values are catalogued measurements.

Derived values

Computed from source-backed inputs via standard formulae — not observations. Every input and constant is traced below.

Bulk density10.84 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 3750.38 M⊕ · NASA
- radiusEarth = 12.4 R⊕ · NASA
Assumptions: M⊕ = 5.972e+24 kg, R⊕ = 6371000 m (IAU 2015 B3 nominal); Assumes a uniform sphere.
Limitations: Withheld above 30 g/cm³ (inconsistent mass/radius inputs).; Archive mass/radius carry no propagated uncertainty here.
Uncertainty: not propagated (inputs carry no catalogued uncertainty)
Computed as of 2026-06-29.

Quality & authority

Partial

Unreviewed

Description: Complete
Source coverage: Partial
Relationship coverage: Complete
Review coverage: None
Citation coverage: None
Image coverage: Not applicable

Data from the NASA Exoplanet Archive. See source quality.