TOI-4307 b
Astrophysical Synthesis & Habitability Characterization
TOI-4307 b is a confirmed super-earth exoplanet orbiting the star TOI-4307, located approximately 117.6 light-years (36.05 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 0.0135% across the stellar disk), this world measures 1.39 Earth radii and has a measured mass of 2.51 Earth masses. Combining its mass and radius yields a mean bulk density of 5.15 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.3 g⊕ (12.75 m/s²), and an escape velocity of 15 km/s.
In its orbital architecture around TOI-4307, TOI-4307 b completes one full revolution every 32.697 Earth days. The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 615 K (+342°C / +648°F) and receiving 33.75 S⊕ (~45,930 W/m²), TOI-4307 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-4307 is classified as a stellar host with an effective photospheric temperature of 6,079 K, a radius of 1.0984 R☉, a mass of 1.14 M☉, an estimated bolometric luminosity of 1.478 L☉. From Earth, TOI-4307 shines at apparent V-band magnitude 7.17 (accessible to binoculars and small amateur telescopes) 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-4307 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,079 K |
| Stellar Radius | 1.0984 R☉ |
| Stellar Mass | 1.1400 M☉ |
| Bolometric Luminosity | 1.478 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 7.170 · G: 7.020 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 32.697 days |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 5.15 g/cm³ (15 km/s vesc) |
| Insolation Flux | 33.7476 S⊕ (~45,930 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 117.600 LY (36.047 pc) |