TOI-7008 b
Astrophysical Synthesis & Habitability Characterization
TOI-7008 b is a confirmed sub-neptune exoplanet orbiting the star TOI-7008, located approximately 1338.8 light-years (410.47 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 0.2267% across the stellar disk), this world measures 4.947 Earth radii (0.44 Jupiter radii) and has a measured mass of 21.7 Earth masses. Combining its mass and radius yields a mean bulk density of 0.99 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.89 g⊕ (8.73 m/s²), and an escape velocity of 23.4 km/s.
In its orbital architecture around TOI-7008, TOI-7008 b completes one full revolution every 0.841 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1783 K (+1510°C / +2750°F) and receiving 1,679.35 S⊕ (~2,285,595 W/m²), TOI-7008 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-7008 is classified as a stellar host with an effective photospheric temperature of 5,116 K, a radius of 0.9526 R☉, a mass of 0.88 M☉, an estimated bolometric luminosity of 0.558 L☉. From Earth, TOI-7008 shines at apparent V-band magnitude 13.6 (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-7008 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,116 K |
| Stellar Radius | 0.9526 R☉ |
| Stellar Mass | 0.8800 M☉ |
| Bolometric Luminosity | 0.558 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 13.600 · G: 13.452 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 0.841 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 81.4173° |
| Mean Bulk Density | 0.99 g/cm³ (23.4 km/s vesc) |
| Insolation Flux | 1679.3500 S⊕ (~2,285,595 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1338.800 LY (410.467 pc) |