TOI-2669 b
Astrophysical Synthesis & Habitability Characterization
TOI-2669 b is a confirmed gas giant exoplanet orbiting the star TOI-2669, located approximately 1283.2 light-years (393.44 parsecs) from the Solar System. First announced in 2022 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.1946% across the stellar disk), this world measures 19.728 Earth radii (1.76 Jupiter radii) and has a measured mass of 193.875 Earth masses (0.61 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.14 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.5 g⊕ (4.9 m/s²), and an escape velocity of 35.1 km/s.
In its orbital architecture around TOI-2669, TOI-2669 b completes one full revolution every 6.203 Earth days. Its moderate orbital eccentricity of e = 0.09 driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1226 K (+953°C / +1747°F) and receiving 375.55 S⊕ (~511,129 W/m²), TOI-2669 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2669 is classified as a stellar host with an effective photospheric temperature of 4,800 K, a radius of 4.1 R☉, a mass of 1.19 M☉, an estimated bolometric luminosity of 8.006 L☉. Stellar evolution modeling indicates an estimated stellar age of 5.9 Gyr and a metallicity of [Fe/H] = 0.1 dex (metal-rich relative to the Sun). From Earth, TOI-2669 shines at apparent V-band magnitude 10.916 (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-2669 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,800 K |
| Stellar Radius | 4.1000 R☉ |
| Stellar Mass | 1.1900 M☉ |
| Bolometric Luminosity | 8.006 L☉ |
| Metallicity [Fe/H] | 0.100 dex |
| Stellar Age | 5.900 Gyr |
| Apparent Magnitude | V: 10.916 · G: 10.602 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 6.203 days |
| Orbital Eccentricity (e) | 0.09000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 0.14 g/cm³ (35.1 km/s vesc) |
| Insolation Flux | 375.5540 S⊕ (~511,129 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1283.200 LY (393.443 pc) |