TOI-5005 b
Astrophysical Synthesis & Habitability Characterization
TOI-5005 b is a confirmed gas giant exoplanet orbiting the star TOI-5005, located approximately 678 light-years (207.89 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 0.3796% across the stellar disk), this world measures 6.25 Earth radii (0.56 Jupiter radii) and has a measured mass of 32.7 Earth masses (0.1 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.74 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.84 g⊕ (8.24 m/s²), and an escape velocity of 25.6 km/s.
In its orbital architecture around TOI-5005, TOI-5005 b completes one full revolution every 6.309 Earth days at a semi-major axis of 0.06614 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 114.1 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1040 K (+767°C / +1413°F) and receiving 226.00 S⊕ (~307,586 W/m²), TOI-5005 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-5005 is classified as a solar-type yellow star of spectral type G2 V with an effective photospheric temperature of 5,749 K, a radius of 0.93 R☉, a mass of 0.97 M☉, an estimated bolometric luminosity of 0.848 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.2 Gyr and a metallicity of [Fe/H] = 0.15 dex (metal-rich relative to the Sun). From Earth, TOI-5005 shines at apparent V-band magnitude 11.867 (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-5005 |
| Spectral Type | G2 V |
| Effective Temp (Teff) | 5,749 K |
| Stellar Radius | 0.9300 R☉ |
| Stellar Mass | 0.9700 M☉ |
| Bolometric Luminosity | 0.848 L☉ |
| Metallicity [Fe/H] | 0.150 dex |
| Stellar Age | 2.200 Gyr |
| Apparent Magnitude | V: 11.867 · G: 11.638 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.066140 AU |
| Orbital Period | 6.309 days |
| Mean Orbital Velocity | 114.1 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 89.5300° |
| Mean Bulk Density | 0.74 g/cm³ (25.6 km/s vesc) |
| Insolation Flux | 226.0000 S⊕ (~307,586 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 678.000 LY (207.891 pc) |