TOI-1716.01
Astrophysical Synthesis & Habitability Characterization
TOI-1716.01 is a confirmed sub-neptune exoplanet orbiting the star TOI-1716, located approximately 339.7 light-years (104.16 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 0.054% across the stellar disk), this world measures 3.143 Earth radii (0.28 Jupiter radii) and has a measured mass of 10 Earth masses. Combining its mass and radius yields a mean bulk density of 1.78 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.01 g⊕ (9.9 m/s²), and an escape velocity of 20 km/s.
In its orbital architecture around TOI-1716, TOI-1716.01 completes one full revolution every 8.082 Earth days at a semi-major axis of 0.080496 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 108.3 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 959 K (+686°C / +1267°F) and receiving 254.83 S⊕ (~346,824 W/m²), TOI-1716.01 orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1716 is classified as a stellar host with an effective photospheric temperature of 5,879 K, a radius of 1.24 R☉, a mass of 1.07 M☉, an estimated bolometric luminosity of 1.648 L☉. Stellar evolution modeling indicates an estimated stellar age of 5.4 Gyr and a metallicity of [Fe/H] = 0.096 dex (metal-rich relative to the Sun). From Earth, TOI-1716 shines at apparent V-band magnitude 9.406 (accessible to binoculars and small amateur telescopes) 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-1716 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,879 K |
| Stellar Radius | 1.2400 R☉ |
| Stellar Mass | 1.0700 M☉ |
| Bolometric Luminosity | 1.648 L☉ |
| Metallicity [Fe/H] | 0.096 dex |
| Stellar Age | 5.400 Gyr |
| Apparent Magnitude | V: 9.406 · G: 9.241 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.080496 AU |
| Orbital Period | 8.082 days |
| Mean Orbital Velocity | 108.3 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.78 g/cm³ (20 km/s vesc) |
| Insolation Flux | 254.8300 S⊕ (~346,824 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 339.700 LY (104.158 pc) |