TOI-2207 b
Astrophysical Synthesis & Habitability Characterization
TOI-2207 b is a confirmed gas giant exoplanet orbiting the star TOI-2207, located approximately 1217.7 light-years (373.35 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 0.4274% across the stellar disk), this world measures 11.153 Earth radii (1 Jupiter radii) and has a measured mass of 203.41 Earth masses (0.64 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.81 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.64 g⊕ (16.08 m/s²), and an escape velocity of 47.8 km/s.
In its orbital architecture around TOI-2207, TOI-2207 b completes one full revolution every 8.002 Earth days at a semi-major axis of 0.0854 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 116.1 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.174 carries the world between 0.0705 AU at periapsis and 0.1003 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1259 K (+986°C / +1807°F) and receiving 406.00 S⊕ (~552,566 W/m²), TOI-2207 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2207 is classified as a stellar host with an effective photospheric temperature of 6,101 K, a radius of 1.564 R☉, a mass of 1.296 M☉, an estimated bolometric luminosity of 3.041 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.3 Gyr and a metallicity of [Fe/H] = 0.181 dex (metal-rich relative to the Sun). From Earth, TOI-2207 shines at apparent V-band magnitude 11.316 (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-2207 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,101 K |
| Stellar Radius | 1.5640 R☉ |
| Stellar Mass | 1.2960 M☉ |
| Bolometric Luminosity | 3.041 L☉ |
| Metallicity [Fe/H] | 0.181 dex |
| Stellar Age | 3.300 Gyr |
| Apparent Magnitude | V: 11.316 · G: 11.355 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.085400 AU |
| Orbital Period | 8.002 days |
| Mean Orbital Velocity | 116.1 km/s |
| Orbital Eccentricity (e) | 0.17400 |
| Orbital Inclination (i) | 88.8400° |
| Mean Bulk Density | 0.81 g/cm³ (47.8 km/s vesc) |
| Insolation Flux | 406.0000 S⊕ (~552,566 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1217.700 LY (373.345 pc) |