TOI-5893 b
Astrophysical Synthesis & Habitability Characterization
TOI-5893 b is a confirmed gas giant exoplanet orbiting the star TOI-5893, located approximately 1045.8 light-years (320.64 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 0.7315% across the stellar disk), this world measures 10.906 Earth radii (0.97 Jupiter radii) and has a measured mass of 321.642 Earth masses (1.01 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.37 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 2.7 g⊕ (26.48 m/s²), and an escape velocity of 60.7 km/s.
In its orbital architecture around TOI-5893, TOI-5893 b completes one full revolution every 40.369 Earth days at a semi-major axis of 0.2348 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 63.3 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 638 K (+365°C / +689°F) and receiving 193.48 S⊕ (~263,322 W/m²), TOI-5893 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-5893 is classified as a stellar host with an effective photospheric temperature of 5,930 K, a radius of 1.169 R☉, a mass of 1.058 M☉, an estimated bolometric luminosity of 1.516 L☉. Stellar evolution modeling indicates an estimated stellar age of 5.9 Gyr and a metallicity of [Fe/H] = 0.136 dex (metal-rich relative to the Sun). From Earth, TOI-5893 shines at apparent V-band magnitude 12.006 (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-5893 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,930 K |
| Stellar Radius | 1.1690 R☉ |
| Stellar Mass | 1.0580 M☉ |
| Bolometric Luminosity | 1.516 L☉ |
| Metallicity [Fe/H] | 0.136 dex |
| Stellar Age | 5.900 Gyr |
| Apparent Magnitude | V: 12.006 · G: 11.928 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.234800 AU |
| Orbital Period | 40.369 days |
| Mean Orbital Velocity | 63.3 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.1050° |
| Mean Bulk Density | 1.37 g/cm³ (60.7 km/s vesc) |
| Insolation Flux | 193.4770 S⊕ (~263,322 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1045.800 LY (320.641 pc) |