TOI-7169 b
Astrophysical Synthesis & Habitability Characterization
TOI-7169 b is a confirmed gas giant exoplanet orbiting the star TOI-7169, located approximately 1523.6 light-years (467.15 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 1.0211% across the stellar disk), this world measures 16.533 Earth radii (1.47 Jupiter radii) and has a measured mass of 130.31 Earth masses (0.41 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.16 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.48 g⊕ (4.71 m/s²), and an escape velocity of 31.4 km/s.
In its orbital architecture around TOI-7169, TOI-7169 b completes one full revolution every 3.437 Earth days at a semi-major axis of 0.0428 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 135.5 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.055 carries the world between 0.0404 AU at periapsis and 0.0452 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1631 K (+1358°C / +2476°F) and receiving 1,169.00 S⊕ (~1,591,009 W/m²), TOI-7169 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-7169 is classified as a solar-type yellow star of spectral type G with an effective photospheric temperature of 5,714 K, a radius of 1.5 R☉, a mass of 0.885 M☉, an estimated bolometric luminosity of 2.152 L☉. Stellar evolution modeling indicates an estimated stellar age of 12.3 Gyr and a metallicity of [Fe/H] = -0.72 dex (metal-poor relative to the Sun). From Earth, TOI-7169 shines at apparent V-band magnitude 12.088 (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-7169 |
| Spectral Type | G |
| Effective Temp (Teff) | 5,714 K |
| Stellar Radius | 1.5000 R☉ |
| Stellar Mass | 0.8850 M☉ |
| Bolometric Luminosity | 2.152 L☉ |
| Metallicity [Fe/H] | -0.720 dex |
| Stellar Age | 12.300 Gyr |
| Apparent Magnitude | V: 12.088 · G: 12.373 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.042800 AU |
| Orbital Period | 3.437 days |
| Mean Orbital Velocity | 135.5 km/s |
| Orbital Eccentricity (e) | 0.05500 |
| Orbital Inclination (i) | 84.6200° |
| Mean Bulk Density | 0.16 g/cm³ (31.4 km/s vesc) |
| Insolation Flux | 1169.0000 S⊕ (~1,591,009 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1523.600 LY (467.151 pc) |