TOI-797 b
Astrophysical Synthesis & Habitability Characterization
TOI-797 b is a confirmed terrestrial exoplanet orbiting the star TOI-797, located approximately 183.3 light-years (56.19 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 0.0548% across the stellar disk), this world measures 1.21 Earth radii and has a measured mass of 1.92 Earth masses. Combining its mass and radius yields a mean bulk density of 5.98 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.31 g⊕ (12.85 m/s²), and an escape velocity of 14.1 km/s.
In its orbital architecture around TOI-797, TOI-797 b completes one full revolution every 1.801 Earth days. 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 729 K (+456°C / +853°F) and receiving 66.88 S⊕ (~91,019 W/m²), TOI-797 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-797 is classified as a stellar host with an effective photospheric temperature of 3,607 K, a radius of 0.4737 R☉, a mass of 0.4715 M☉, an estimated bolometric luminosity of 0.034 L☉. From Earth, TOI-797 shines at apparent V-band magnitude 13.689 (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-797 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,607 K |
| Stellar Radius | 0.4737 R☉ |
| Stellar Mass | 0.4715 M☉ |
| Bolometric Luminosity | 0.034 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 13.689 · G: 12.803 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 1.801 days |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 5.98 g/cm³ (14.1 km/s vesc) |
| Insolation Flux | 66.8766 S⊕ (~91,019 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 183.300 LY (56.193 pc) |