TOI-7176 b
Astrophysical Synthesis & Habitability Characterization
TOI-7176 b is a confirmed gas giant exoplanet orbiting the star TOI-7176, located approximately 226.2 light-years (69.35 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 1.3295% across the stellar disk), this world measures 8.653 Earth radii (0.77 Jupiter radii) and has a measured mass of 200.868 Earth masses (0.63 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.71 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 2.68 g⊕ (26.28 m/s²), and an escape velocity of 53.9 km/s.
In its orbital architecture around TOI-7176, TOI-7176 b completes one full revolution every 47.88 Earth days at a semi-major axis of 0.2292 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 52.1 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.189 carries the world between 0.1859 AU at periapsis and 0.2725 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 377 K (+104°C / +219°F) and receiving 10.04 S⊕ (~13,664 W/m²), TOI-7176 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-7176 is classified as a stellar host with an effective photospheric temperature of 4,507 K, a radius of 0.688 R☉, a mass of 0.7 M☉, an estimated bolometric luminosity of 0.175 L☉. Stellar evolution modeling indicates an estimated stellar age of 9.7 Gyr and a metallicity of [Fe/H] = -0.014 dex (near-solar heavy-element abundance). From Earth, TOI-7176 shines at apparent V-band magnitude 11.46 (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-7176 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,507 K |
| Stellar Radius | 0.6880 R☉ |
| Stellar Mass | 0.7000 M☉ |
| Bolometric Luminosity | 0.175 L☉ |
| Metallicity [Fe/H] | -0.014 dex |
| Stellar Age | 9.700 Gyr |
| Apparent Magnitude | V: 11.460 · G: 11.197 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.229200 AU |
| Orbital Period | 47.88 days |
| Mean Orbital Velocity | 52.1 km/s |
| Orbital Eccentricity (e) | 0.18900 |
| Orbital Inclination (i) | 89.5640° |
| Mean Bulk Density | 1.71 g/cm³ (53.9 km/s vesc) |
| Insolation Flux | 10.0394 S⊕ (~13,664 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 226.200 LY (69.354 pc) |