TOI-1768.01
Astrophysical Synthesis & Habitability Characterization
TOI-1768.01 is a confirmed sub-neptune exoplanet orbiting the star TOI-1768, located approximately 514 light-years (157.6 parsecs) from the Solar System. First announced in 2024 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.0828% across the stellar disk), this world measures 3.453 Earth radii (0.31 Jupiter radii) and has a measured mass of 11.8 Earth masses. Combining its mass and radius yields a mean bulk density of 1.58 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.99 g⊕ (9.71 m/s²), and an escape velocity of 20.7 km/s.
In its orbital architecture around TOI-1768, TOI-1768.01 completes one full revolution every 7.338 Earth days at a semi-major axis of 0.076381 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 113.2 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1566 K (+1293°C / +2359°F) and receiving 240.87 S⊕ (~327,824 W/m²), TOI-1768.01 orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1768 is classified as a stellar host with an effective photospheric temperature of 5,994 K, a radius of 1.1 R☉, a mass of 1.1 M☉, an estimated bolometric luminosity of 1.401 L☉. From Earth, TOI-1768 shines at apparent V-band magnitude 10.419 (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-1768 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,994 K |
| Stellar Radius | 1.1000 R☉ |
| Stellar Mass | 1.1000 M☉ |
| Bolometric Luminosity | 1.401 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 10.419 · G: 10.311 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.076381 AU |
| Orbital Period | 7.338 days |
| Mean Orbital Velocity | 113.2 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.58 g/cm³ (20.7 km/s vesc) |
| Insolation Flux | 240.8700 S⊕ (~327,824 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 514.000 LY (157.597 pc) |