TOI-4492 b
Astrophysical Synthesis & Habitability Characterization
TOI-4492 b is a confirmed gas giant exoplanet orbiting the star TOI-4492, located approximately 467 light-years (143.18 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 0.7812% across the stellar disk), this world measures 11.781 Earth radii (1.05 Jupiter radii) and has a measured mass of 1881.544 Earth masses (5.92 Jupiter masses). Combining its mass and radius yields a mean bulk density of 6.35 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 13.56 g⊕ (132.98 m/s²), and an escape velocity of 141.4 km/s.
In its orbital architecture around TOI-4492, TOI-4492 b completes one full revolution every 4.433 Earth days at a semi-major axis of 0.0535 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 131.3 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1207 K (+934°C / +1713°F) and receiving 510.00 S⊕ (~694,110 W/m²), TOI-4492 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-4492 is classified as a solar-type yellow star of spectral type G2 V with an effective photospheric temperature of 5,711 K, a radius of 1.222 R☉, a mass of 1.067 M☉, an estimated bolometric luminosity of 1.425 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.219 dex (metal-rich relative to the Sun). From Earth, TOI-4492 shines at apparent V-band magnitude 10.324 (faint and requiring research-grade or CCD telescopic photometry) in the Northern 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-4492 |
| Spectral Type | G2 V |
| Effective Temp (Teff) | 5,711 K |
| Stellar Radius | 1.2220 R☉ |
| Stellar Mass | 1.0670 M☉ |
| Bolometric Luminosity | 1.425 L☉ |
| Metallicity [Fe/H] | 0.219 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 10.324 · G: 10.090 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.053500 AU |
| Orbital Period | 4.433 days |
| Mean Orbital Velocity | 131.3 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 88.7800° |
| Mean Bulk Density | 6.35 g/cm³ (141.4 km/s vesc) |
| Insolation Flux | 510.0000 S⊕ (~694,110 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 467.000 LY (143.184 pc) |