TOI-3464 b
Astrophysical Synthesis & Habitability Characterization
TOI-3464 b is a confirmed gas giant exoplanet orbiting the star TOI-3464, located approximately 1949.7 light-years (597.77 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 0.6544% across the stellar disk), this world measures 13.765 Earth radii (1.23 Jupiter radii) and has a measured mass of 397.286 Earth masses (1.25 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.84 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 2.1 g⊕ (20.59 m/s²), and an escape velocity of 60.1 km/s.
In its orbital architecture around TOI-3464, TOI-3464 b completes one full revolution every 3.652 Earth days at a semi-major axis of 0.0515 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 153.4 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.25, swinging from 0.0386 AU at periapsis out to 0.0644 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1693 K (+1420°C / +2588°F) and receiving 1,370.00 S⊕ (~1,864,570 W/m²), TOI-3464 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-3464 is classified as a stellar host with an effective photospheric temperature of 6,370 K, a radius of 1.56 R☉, a mass of 1.363 M☉, an estimated bolometric luminosity of 3.595 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.1 Gyr and a metallicity of [Fe/H] = 0.045 dex (near-solar heavy-element abundance). From Earth, TOI-3464 shines at apparent V-band magnitude 12.731 (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-3464 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,370 K |
| Stellar Radius | 1.5600 R☉ |
| Stellar Mass | 1.3630 M☉ |
| Bolometric Luminosity | 3.595 L☉ |
| Metallicity [Fe/H] | 0.045 dex |
| Stellar Age | 2.100 Gyr |
| Apparent Magnitude | V: 12.731 · G: 12.509 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.051500 AU |
| Orbital Period | 3.652 days |
| Mean Orbital Velocity | 153.4 km/s |
| Orbital Eccentricity (e) | 0.25000 |
| Orbital Inclination (i) | 82.8900° |
| Mean Bulk Density | 0.84 g/cm³ (60.1 km/s vesc) |
| Insolation Flux | 1370.0000 S⊕ (~1,864,570 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1949.700 LY (597.774 pc) |