TOI-4379 b
Astrophysical Synthesis & Habitability Characterization
TOI-4379 b is a confirmed gas giant exoplanet orbiting the star TOI-4379, located approximately 2104.2 light-years (645.16 parsecs) from the Solar System. First announced in 2024 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.5996% across the stellar disk), this world measures 16.69 Earth radii (1.49 Jupiter radii) and has a measured mass of 353.743 Earth masses (1.11 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.42 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.27 g⊕ (12.45 m/s²), and an escape velocity of 51.5 km/s.
In its orbital architecture around TOI-4379, TOI-4379 b completes one full revolution every 3.254 Earth days. With a near-circular eccentricity of e = 0.018, the planet experiences minimal orbital distance variation.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1869 K (+1596°C / +2905°F) and receiving 2,886.09 S⊕ (~3,927,969 W/m²), TOI-4379 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-4379 is classified as a stellar host with an effective photospheric temperature of 6,020 K, a radius of 1.976 R☉, a mass of 1.372 M☉, an estimated bolometric luminosity of 4.601 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.51 Gyr and a metallicity of [Fe/H] = 0.16 dex (metal-rich relative to the Sun). From Earth, TOI-4379 shines at apparent V-band magnitude 12.661 (faint and requiring research-grade or CCD telescopic photometry) in the Southern 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: Transiting Exoplanet Survey Satellite (TESS) · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | TOI-4379 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,020 K |
| Stellar Radius | 1.9760 R☉ |
| Stellar Mass | 1.3720 M☉ |
| Bolometric Luminosity | 4.601 L☉ |
| Metallicity [Fe/H] | 0.160 dex |
| Stellar Age | 4.510 Gyr |
| Apparent Magnitude | V: 12.661 · G: 12.408 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 3.254 days |
| Orbital Eccentricity (e) | 0.01800 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 0.42 g/cm³ (51.5 km/s vesc) |
| Insolation Flux | 2886.0903 S⊕ (~3,927,969 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2104.200 LY (645.158 pc) |