TOI-2379 b
Astrophysical Synthesis & Habitability Characterization
TOI-2379 b is a confirmed gas giant exoplanet orbiting the star TOI-2379, located approximately 689 light-years (211.25 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 2.9867% across the stellar disk), this world measures 11.725 Earth radii (1.05 Jupiter radii) and has a measured mass of 1830.692 Earth masses (5.76 Jupiter masses). Combining its mass and radius yields a mean bulk density of 6.26 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 13.32 g⊕ (130.62 m/s²), and an escape velocity of 139.8 km/s.
In its orbital architecture around TOI-2379, TOI-2379 b completes one full revolution every 5.469 Earth days at a semi-major axis of 0.05263 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 104.7 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.342, swinging from 0.0346 AU at periapsis out to 0.0706 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 624 K (+351°C / +664°F) and receiving 25.30 S⊕ (~34,433 W/m²), TOI-2379 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2379 is classified as a stellar host with an effective photospheric temperature of 3,707 K, a radius of 0.622 R☉, a mass of 0.645 M☉, an estimated bolometric luminosity of 0.066 L☉. Stellar evolution modeling indicates an estimated stellar age of 10.4 Gyr and a metallicity of [Fe/H] = 0.501 dex (metal-rich relative to the Sun). From Earth, TOI-2379 shines at apparent V-band magnitude 15.548 (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-2379 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,707 K |
| Stellar Radius | 0.6220 R☉ |
| Stellar Mass | 0.6450 M☉ |
| Bolometric Luminosity | 0.066 L☉ |
| Metallicity [Fe/H] | 0.501 dex |
| Stellar Age | 10.400 Gyr |
| Apparent Magnitude | V: 15.548 · G: 14.660 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.052630 AU |
| Orbital Period | 5.469 days |
| Mean Orbital Velocity | 104.7 km/s |
| Orbital Eccentricity (e) | 0.34200 |
| Orbital Inclination (i) | 88.8500° |
| Mean Bulk Density | 6.26 g/cm³ (139.8 km/s vesc) |
| Insolation Flux | 25.3000 S⊕ (~34,433 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 689.000 LY (211.247 pc) |