TOI-4507 b
Astrophysical Synthesis & Habitability Characterization
TOI-4507 b is a confirmed gas giant exoplanet orbiting the star TOI-4507, located approximately 581.4 light-years (178.26 parsecs) from the Solar System. First announced in 2025 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.5225% across the stellar disk), this world measures 8.2 Earth radii (0.73 Jupiter radii) and has a measured mass of 20 Earth masses. Combining its mass and radius yields a mean bulk density of 0.2 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.3 g⊕ (2.94 m/s²), and an escape velocity of 17.5 km/s.
In its orbital architecture around TOI-4507, TOI-4507 b completes one full revolution every 104.616 Earth days at a semi-major axis of 0.456 AU (situated at an orbital separation between Mercury's 0.39 AU and Venus's 0.72 AU). Its mean orbital velocity is approximately 47.4 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.09 carries the world between 0.415 AU at periapsis and 0.497 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 465 K (+192°C / +378°F) and receiving 23.58 S⊕ (~32,089 W/m²), TOI-4507 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-4507 is classified as a warm F-type star of spectral type F with an effective photospheric temperature of 6,260 K, a radius of 1.04 R☉, a mass of 1.11 M☉, an estimated bolometric luminosity of 1.49 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.7 Gyr and a metallicity of [Fe/H] = -0.06 dex (near-solar heavy-element abundance). From Earth, TOI-4507 shines at apparent V-band magnitude 10.806 (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-4507 |
| Spectral Type | F |
| Effective Temp (Teff) | 6,260 K |
| Stellar Radius | 1.0400 R☉ |
| Stellar Mass | 1.1100 M☉ |
| Bolometric Luminosity | 1.49 L☉ |
| Metallicity [Fe/H] | -0.060 dex |
| Stellar Age | 0.700 Gyr |
| Apparent Magnitude | V: 10.806 · G: 10.567 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.456000 AU |
| Orbital Period | 104.616 days |
| Mean Orbital Velocity | 47.4 km/s |
| Orbital Eccentricity (e) | 0.09000 |
| Orbital Inclination (i) | 89.9300° |
| Mean Bulk Density | 0.2 g/cm³ (17.5 km/s vesc) |
| Insolation Flux | 23.5778 S⊕ (~32,089 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 581.400 LY (178.260 pc) |