WASP-135 b
Astrophysical Synthesis & Habitability Characterization
WASP-135 b is a confirmed gas giant exoplanet orbiting the star WASP-135, located approximately 972.6 light-years (298.21 parsecs) from the Solar System. First announced in 2015 by SuperWASP using the Transit detection technique (producing an estimated primary transit depth of 1.9366% across the stellar disk), this world measures 14.572 Earth radii (1.3 Jupiter radii) and has a measured mass of 603.877 Earth masses (1.9 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.08 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 2.84 g⊕ (27.85 m/s²), and an escape velocity of 72 km/s.
In its orbital architecture around WASP-135, WASP-135 b completes one full revolution every 1.401 Earth days at a semi-major axis of 0.0243 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 188.6 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 1404 K (+1131°C / +2068°F) and receiving 917.41 S⊕ (~1,248,595 W/m²), WASP-135 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star WASP-135 is classified as a solar-type yellow star of spectral type G5 V with an effective photospheric temperature of 5,675 K, a radius of 0.96 R☉, a mass of 0.98 M☉, an estimated bolometric luminosity of 0.858 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.6 Gyr and a metallicity of [Fe/H] = 0.02 dex (near-solar heavy-element abundance). From Earth, WASP-135 shines at apparent V-band magnitude 13.181 (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: SuperWASP · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | WASP-135 |
| Spectral Type | G5 V |
| Effective Temp (Teff) | 5,675 K |
| Stellar Radius | 0.9600 R☉ |
| Stellar Mass | 0.9800 M☉ |
| Bolometric Luminosity | 0.858 L☉ |
| Metallicity [Fe/H] | 0.020 dex |
| Stellar Age | 0.600 Gyr |
| Apparent Magnitude | V: 13.181 · G: 13.005 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.024300 AU |
| Orbital Period | 1.401 days |
| Mean Orbital Velocity | 188.6 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 82.0000° |
| Mean Bulk Density | 1.08 g/cm³ (72 km/s vesc) |
| Insolation Flux | 917.4101 S⊕ (~1,248,595 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 972.600 LY (298.214 pc) |