TOI-3593 b
Astrophysical Synthesis & Habitability Characterization
TOI-3593 b is a confirmed gas giant exoplanet orbiting the star TOI-3593, located approximately 739.2 light-years (226.63 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 1.2134% across the stellar disk), this world measures 11.03 Earth radii (0.98 Jupiter radii) and has a measured mass of 565.735 Earth masses (1.78 Jupiter masses). Combining its mass and radius yields a mean bulk density of 2.32 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 4.65 g⊕ (45.6 m/s²), and an escape velocity of 80.1 km/s.
In its orbital architecture around TOI-3593, TOI-3593 b completes one full revolution every 3.821 Earth days at a semi-major axis of 0.0481 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 136.9 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.105 carries the world between 0.043 AU at periapsis and 0.0532 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1170 K (+897°C / +1647°F) and receiving 308.00 S⊕ (~419,188 W/m²), TOI-3593 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-3593 is classified as a stellar host with an effective photospheric temperature of 5,550 K, a radius of 0.918 R☉, a mass of 1.015 M☉, an estimated bolometric luminosity of 0.717 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.8 Gyr and a metallicity of [Fe/H] = 0.384 dex (metal-rich relative to the Sun). From Earth, TOI-3593 shines at apparent V-band magnitude 12.201 (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-3593 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,550 K |
| Stellar Radius | 0.9180 R☉ |
| Stellar Mass | 1.0150 M☉ |
| Bolometric Luminosity | 0.717 L☉ |
| Metallicity [Fe/H] | 0.384 dex |
| Stellar Age | 1.800 Gyr |
| Apparent Magnitude | V: 12.201 · G: 12.034 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.048100 AU |
| Orbital Period | 3.821 days |
| Mean Orbital Velocity | 136.9 km/s |
| Orbital Eccentricity (e) | 0.10500 |
| Orbital Inclination (i) | 88.0900° |
| Mean Bulk Density | 2.32 g/cm³ (80.1 km/s vesc) |
| Insolation Flux | 308.0000 S⊕ (~419,188 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 739.200 LY (226.630 pc) |