TOI-2107 b
Astrophysical Synthesis & Habitability Characterization
TOI-2107 b is a confirmed gas giant exoplanet orbiting the star TOI-2107, located approximately 772 light-years (236.71 parsecs) from the Solar System. First announced in 2024 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 1.7829% across the stellar disk), this world measures 13.574 Earth radii (1.21 Jupiter radii) and has a measured mass of 263.798 Earth masses (0.83 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.58 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.43 g⊕ (14.02 m/s²), and an escape velocity of 49.3 km/s.
In its orbital architecture around TOI-2107, TOI-2107 b completes one full revolution every 2.455 Earth days at a semi-major axis of 0.03515 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 155.8 km/s (compared to Earth's 29.8 km/s). With a near-circular eccentricity of e = 0.033 (ranging from 0.034 AU at periapsis to 0.0363 AU at apoapsis), the planet experiences minimal orbital distance variation.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1397 K (+1124°C / +2055°F) and receiving 508.47 S⊕ (~692,025 W/m²), TOI-2107 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2107 is classified as a stellar host with an effective photospheric temperature of 5,627 K, a radius of 0.932 R☉, a mass of 0.961 M☉, an estimated bolometric luminosity of 0.781 L☉. Stellar evolution modeling indicates an estimated stellar age of 4 Gyr and a metallicity of [Fe/H] = 0.07 dex (metal-rich relative to the Sun). From Earth, TOI-2107 shines at apparent V-band magnitude 12.036 (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-2107 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,627 K |
| Stellar Radius | 0.9320 R☉ |
| Stellar Mass | 0.9610 M☉ |
| Bolometric Luminosity | 0.781 L☉ |
| Metallicity [Fe/H] | 0.070 dex |
| Stellar Age | 4.000 Gyr |
| Apparent Magnitude | V: 12.036 · G: 11.864 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.035150 AU |
| Orbital Period | 2.455 days |
| Mean Orbital Velocity | 155.8 km/s |
| Orbital Eccentricity (e) | 0.03300 |
| Orbital Inclination (i) | 89.4400° |
| Mean Bulk Density | 0.58 g/cm³ (49.3 km/s vesc) |
| Insolation Flux | 508.4680 S⊕ (~692,025 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 772.000 LY (236.705 pc) |