TOI-2193 A b
Astrophysical Synthesis & Habitability Characterization
TOI-2193 A b is a confirmed gas giant exoplanet orbiting the star TOI-2193 A, located approximately 1099.4 light-years (337.06 parsecs) from the Solar System. First announced in 2022 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 2.1242% across the stellar disk), this world measures 19.84 Earth radii (1.77 Jupiter radii) and has a measured mass of 298.759 Earth masses (0.94 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.21 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.76 g⊕ (7.45 m/s²), and an escape velocity of 43.4 km/s.
In its orbital architecture around TOI-2193 A, TOI-2193 A b completes one full revolution every 2.123 Earth days at a semi-major axis of 0.03319 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 170.1 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 1763 K (+1490°C / +2714°F) and receiving 1,600.00 S⊕ (~2,177,600 W/m²), TOI-2193 A b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2193 A is classified as a stellar host with an effective photospheric temperature of 5,966 K, a radius of 1.248 R☉, a mass of 1.082 M☉, an estimated bolometric luminosity of 1.77 L☉. Stellar evolution modeling indicates an estimated stellar age of 5.5 Gyr and a metallicity of [Fe/H] = 0.027 dex (near-solar heavy-element abundance). From Earth, TOI-2193 A shines at apparent V-band magnitude 11.976 (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-2193 A |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,966 K |
| Stellar Radius | 1.2480 R☉ |
| Stellar Mass | 1.0820 M☉ |
| Bolometric Luminosity | 1.77 L☉ |
| Metallicity [Fe/H] | 0.027 dex |
| Stellar Age | 5.500 Gyr |
| Apparent Magnitude | V: 11.976 · G: 11.814 |
| System Architecture | 2 Stars, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.033190 AU |
| Orbital Period | 2.123 days |
| Mean Orbital Velocity | 170.1 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 79.9600° |
| Mean Bulk Density | 0.21 g/cm³ (43.4 km/s vesc) |
| Insolation Flux | 1600.0000 S⊕ (~2,177,600 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1099.400 LY (337.064 pc) |