TOI-2364 b
Astrophysical Synthesis & Habitability Characterization
TOI-2364 b is a confirmed gas giant exoplanet orbiting the star TOI-2364, located approximately 716.3 light-years (219.61 parsecs) from the Solar System. First announced in 2023 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.7934% across the stellar disk), this world measures 8.608 Earth radii (0.77 Jupiter radii) and has a measured mass of 71.511 Earth masses (0.22 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.62 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.97 g⊕ (9.51 m/s²), and an escape velocity of 32.2 km/s.
In its orbital architecture around TOI-2364, TOI-2364 b completes one full revolution every 4.02 Earth days at a semi-major axis of 0.04871 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 131.8 km/s (compared to Earth's 29.8 km/s). 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 1091 K (+818°C / +1504°F) and receiving 237.00 S⊕ (~322,557 W/m²), TOI-2364 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2364 is classified as a stellar host with an effective photospheric temperature of 5,306 K, a radius of 0.886 R☉, a mass of 0.954 M☉, an estimated bolometric luminosity of 0.558 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.5 Gyr and a metallicity of [Fe/H] = 0.344 dex (metal-rich relative to the Sun). From Earth, TOI-2364 shines at apparent V-band magnitude 12.234 (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-2364 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,306 K |
| Stellar Radius | 0.8860 R☉ |
| Stellar Mass | 0.9540 M☉ |
| Bolometric Luminosity | 0.558 L☉ |
| Metallicity [Fe/H] | 0.344 dex |
| Stellar Age | 3.500 Gyr |
| Apparent Magnitude | V: 12.234 · G: 12.092 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.048710 AU |
| Orbital Period | 4.02 days |
| Mean Orbital Velocity | 131.8 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 88.9800° |
| Mean Bulk Density | 0.62 g/cm³ (32.2 km/s vesc) |
| Insolation Flux | 237.0000 S⊕ (~322,557 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 716.300 LY (219.614 pc) |