TOI-6707 b
Astrophysical Synthesis & Habitability Characterization
TOI-6707 b is a confirmed sub-neptune exoplanet orbiting the star TOI-6707, located approximately 2092.2 light-years (641.47 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 0.1101% across the stellar disk), this world measures 5.727 Earth radii (0.51 Jupiter radii) and has a measured mass of 27.8 Earth masses. Combining its mass and radius yields a mean bulk density of 0.82 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.85 g⊕ (8.34 m/s²), and an escape velocity of 24.6 km/s.
In its orbital architecture around TOI-6707, TOI-6707 b completes one full revolution every 3.835 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1509 K (+1236°C / +2257°F) and receiving 1,226.79 S⊕ (~1,669,656 W/m²), TOI-6707 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-6707 is classified as a stellar host with an effective photospheric temperature of 6,289 K, a radius of 1.582 R☉, a mass of 1.14 M☉, an estimated bolometric luminosity of 3.513 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.08 dex (near-solar heavy-element abundance). From Earth, TOI-6707 shines at apparent V-band magnitude 12.93 (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-6707 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,289 K |
| Stellar Radius | 1.5820 R☉ |
| Stellar Mass | 1.1400 M☉ |
| Bolometric Luminosity | 3.513 L☉ |
| Metallicity [Fe/H] | -0.080 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 12.930 · G: 12.748 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 3.835 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 87.1669° |
| Mean Bulk Density | 0.82 g/cm³ (24.6 km/s vesc) |
| Insolation Flux | 1226.7862 S⊕ (~1,669,656 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2092.200 LY (641.467 pc) |