TOI-1107 b
Astrophysical Synthesis & Habitability Characterization
TOI-1107 b is a confirmed gas giant exoplanet orbiting the star TOI-1107, located approximately 917.5 light-years (281.31 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 0.5448% across the stellar disk), this world measures 14.572 Earth radii (1.3 Jupiter radii) and has a measured mass of 1064.725 Earth masses (3.35 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.9 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 5.01 g⊕ (49.13 m/s²), and an escape velocity of 95.6 km/s.
In its orbital architecture around TOI-1107, TOI-1107 b completes one full revolution every 4.078 Earth days at a semi-major axis of 0.0561 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 149.7 km/s (compared to Earth's 29.8 km/s). With a near-circular eccentricity of e = 0.025 (ranging from 0.0547 AU at periapsis to 0.0575 AU at apoapsis), the planet experiences minimal orbital distance variation.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1728 K (+1455°C / +2651°F) and receiving 532.00 S⊕ (~724,052 W/m²), TOI-1107 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1107 is classified as a warm F-type star of spectral type F6 V with an effective photospheric temperature of 6,311 K, a radius of 1.81 R☉, a mass of 1.35 M☉, an estimated bolometric luminosity of 4.663 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.6 Gyr and a metallicity of [Fe/H] = -0.1 dex (near-solar heavy-element abundance). From Earth, TOI-1107 shines at apparent V-band magnitude 10.553 (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-1107 |
| Spectral Type | F6 V |
| Effective Temp (Teff) | 6,311 K |
| Stellar Radius | 1.8100 R☉ |
| Stellar Mass | 1.3500 M☉ |
| Bolometric Luminosity | 4.663 L☉ |
| Metallicity [Fe/H] | -0.100 dex |
| Stellar Age | 2.600 Gyr |
| Apparent Magnitude | V: 10.553 · G: 10.375 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.056100 AU |
| Orbital Period | 4.078 days |
| Mean Orbital Velocity | 149.7 km/s |
| Orbital Eccentricity (e) | 0.02500 |
| Orbital Inclination (i) | 88.6300° |
| Mean Bulk Density | 1.9 g/cm³ (95.6 km/s vesc) |
| Insolation Flux | 532.0000 S⊕ (~724,052 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 917.500 LY (281.314 pc) |