TOI-6008 b
Astrophysical Synthesis & Habitability Characterization
TOI-6008 b is a confirmed terrestrial exoplanet orbiting the star TOI-6008, located approximately 75.3 light-years (23.1 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 0.1523% across the stellar disk), this world measures 1.03 Earth radii and has a measured mass of 4 Earth masses. Combining its mass and radius yields a mean bulk density of 20.18 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 3.77 g⊕ (36.97 m/s²), and an escape velocity of 22 km/s.
In its orbital architecture around TOI-6008, TOI-6008 b completes one full revolution every 0.857 Earth days at a semi-major axis of 0.010777 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 136.7 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 707 K (+434°C / +813°F) and receiving 41.50 S⊕ (~56,482 W/m²), TOI-6008 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-6008 is classified as a low-mass red dwarf of spectral type M5.0 with an effective photospheric temperature of 3,075 K, a radius of 0.242 R☉, a mass of 0.23 M☉, an estimated bolometric luminosity of 0.00470 L☉. Stellar evolution modeling indicates an estimated stellar age of 3 Gyr and a metallicity of [Fe/H] = 0.3 dex (metal-rich relative to the Sun). From Earth, TOI-6008 shines at apparent V-band magnitude 15.97 (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-6008 |
| Spectral Type | M5.0 |
| Effective Temp (Teff) | 3,075 K |
| Stellar Radius | 0.2420 R☉ |
| Stellar Mass | 0.2300 M☉ |
| Bolometric Luminosity | 0.00470 L☉ |
| Metallicity [Fe/H] | 0.300 dex |
| Stellar Age | 3.000 Gyr |
| Apparent Magnitude | V: 15.970 · G: 13.712 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.010777 AU |
| Orbital Period | 0.857 days |
| Mean Orbital Velocity | 136.7 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 87.2000° |
| Mean Bulk Density | 20.18 g/cm³ (22 km/s vesc) |
| Insolation Flux | 41.5000 S⊕ (~56,482 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 75.300 LY (23.101 pc) |