TrES-5 b
Astrophysical Synthesis & Habitability Characterization
TrES-5 b is a confirmed gas giant exoplanet orbiting the star TrES-5, located approximately 1175.2 light-years (360.31 parsecs) from the Solar System. First announced in 2011 by TrES using the Transit detection technique (producing an estimated primary transit depth of 1.9984% across the stellar disk), this world measures 13.384 Earth radii (1.19 Jupiter radii) and has a measured mass of 568.916 Earth masses (1.79 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.31 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 3.18 g⊕ (31.19 m/s²), and an escape velocity of 72.9 km/s.
In its orbital architecture around TrES-5, TrES-5 b completes one full revolution every 1.482 Earth days at a semi-major axis of 0.02459 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 180.5 km/s (compared to Earth's 29.8 km/s). The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1480 K (+1207°C / +2205°F) and receiving 442.99 S⊕ (~602,913 W/m²), TrES-5 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TrES-5 is classified as a stellar host with an effective photospheric temperature of 5,171 K, a radius of 0.868 R☉, a mass of 0.901 M☉, an estimated bolometric luminosity of 0.483 L☉. Stellar evolution modeling indicates an estimated stellar age of 7.4 Gyr and a metallicity of [Fe/H] = 0.2 dex (metal-rich relative to the Sun). From Earth, TrES-5 shines at apparent V-band magnitude 13.677 (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: TrES · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | TrES-5 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,171 K |
| Stellar Radius | 0.8680 R☉ |
| Stellar Mass | 0.9010 M☉ |
| Bolometric Luminosity | 0.483 L☉ |
| Metallicity [Fe/H] | 0.200 dex |
| Stellar Age | 7.400 Gyr |
| Apparent Magnitude | V: 13.677 · G: 13.460 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.024590 AU |
| Orbital Period | 1.482 days |
| Mean Orbital Velocity | 180.5 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 84.2700° |
| Mean Bulk Density | 1.31 g/cm³ (72.9 km/s vesc) |
| Insolation Flux | 442.9930 S⊕ (~602,913 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1175.200 LY (360.313 pc) |