G 196-3 b
Astrophysical Synthesis & Habitability Characterization
G 196-3 b is a confirmed gas giant exoplanet orbiting the star G 196-3, located approximately 71.1 light-years (21.79 parsecs) from the Solar System. First announced in 2024 by European Space Agency (ESA) Gaia Satellite using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 12 Earth radii (1.07 Jupiter radii) and has a measured mass of 8263.539 Earth masses (26 Jupiter masses). Combining its mass and radius yields a mean bulk density of 26.37 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 57.39 g⊕ (562.8 m/s²), and an escape velocity of 293.5 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1670 K (+1397°C / +2547°F), G 196-3 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star G 196-3 is classified as a stellar host with an effective photospheric temperature of 3,517 K, a radius of 0.5224 R☉, a mass of 0.5198 M☉, an estimated bolometric luminosity of 0.037 L☉. From Earth, G 196-3 shines at apparent V-band magnitude 11.672 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.
Methodology: Computed using the Schulze-Makuch et al. (2011) weighted metric comparing physical interior (radius, estimated density) and surface thermal regime (escape velocity, equilibrium temperature).
Discovery Facility: European Space Agency (ESA) Gaia Satellite · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | G 196-3 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,517 K |
| Stellar Radius | 0.5224 R☉ |
| Stellar Mass | 0.5198 M☉ |
| Bolometric Luminosity | 0.037 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 11.672 · G: 10.612 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 350.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 26.37 g/cm³ (293.5 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 71.100 LY (21.791 pc) |