TOI-6174 b
Astrophysical Synthesis & Habitability Characterization
TOI-6174 b is a confirmed gas giant exoplanet orbiting the star TOI-6174, located approximately 2342.9 light-years (718.34 parsecs) from the Solar System. First announced in 2026 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.3392% across the stellar disk), this world measures 7.83 Earth radii (0.7 Jupiter radii) and has a measured mass of 47.3 Earth masses (0.15 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.54 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.77 g⊕ (7.55 m/s²), and an escape velocity of 27.5 km/s.
In its orbital architecture around TOI-6174, TOI-6174 b completes one full revolution every 3.525 Earth days. The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1490 K (+1217°C / +2223°F) and receiving 819.05 S⊕ (~1,114,723 W/m²), TOI-6174 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-6174 is classified as a stellar host with an effective photospheric temperature of 5,638 K, a radius of 1.2326 R☉, a mass of 1 M☉, an estimated bolometric luminosity of 1.377 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.354 dex (metal-rich relative to the Sun). From Earth, TOI-6174 shines at apparent V-band magnitude 13.862 (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: Transiting Exoplanet Survey Satellite (TESS) · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | TOI-6174 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,638 K |
| Stellar Radius | 1.2326 R☉ |
| Stellar Mass | 1.0000 M☉ |
| Bolometric Luminosity | 1.377 L☉ |
| Metallicity [Fe/H] | 0.354 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 13.862 · G: 13.741 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 3.525 days |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 0.54 g/cm³ (27.5 km/s vesc) |
| Insolation Flux | 819.0470 S⊕ (~1,114,723 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2342.900 LY (718.342 pc) |