TOI-5716 b
Astrophysical Synthesis & Habitability Characterization
TOI-5716 b is a confirmed terrestrial exoplanet orbiting the star TOI-5716, located approximately 128.5 light-years (39.41 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 0.16% across the stellar disk), this world measures 0.96 Earth radii and has a measured mass of 0.84 Earth masses. Combining its mass and radius yields a mean bulk density of 5.24 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 0.91 g⊕ (8.92 m/s²), and an escape velocity of 10.5 km/s.
In its orbital architecture around TOI-5716, TOI-5716 b completes one full revolution every 6.766 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 400 K (+127°C / +261°F) and receiving 3.41 S⊕ (~4,640 W/m²), TOI-5716 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-5716 is classified as a stellar host with an effective photospheric temperature of 3,436 K, a radius of 0.22 R☉, a mass of 0.19 M☉, an estimated bolometric luminosity of 0.00605 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.54 dex (metal-poor relative to the Sun). From Earth, TOI-5716 shines at apparent V-band magnitude 15.83 (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-5716 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,436 K |
| Stellar Radius | 0.2200 R☉ |
| Stellar Mass | 0.1900 M☉ |
| Bolometric Luminosity | 0.00605 L☉ |
| Metallicity [Fe/H] | -0.540 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 15.830 · G: 14.374 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 6.766 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 89.4000° |
| Mean Bulk Density | 5.24 g/cm³ (10.5 km/s vesc) |
| Insolation Flux | 3.4093 S⊕ (~4,640 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 128.500 LY (39.412 pc) |