WASP-175 b
Astrophysical Synthesis & Habitability Characterization
WASP-175 b is a confirmed gas giant exoplanet orbiting the star WASP-175, located approximately 1759.2 light-years (539.36 parsecs) from the Solar System. First announced in 2019 by WASP-South using the Transit detection technique (producing an estimated primary transit depth of 1.063% across the stellar disk), this world measures 13.54 Earth radii (1.21 Jupiter radii) and has a measured mass of 314.652 Earth masses (0.99 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.7 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.72 g⊕ (16.87 m/s²), and an escape velocity of 53.9 km/s.
In its orbital architecture around WASP-175, WASP-175 b completes one full revolution every 3.065 Earth days at a semi-major axis of 0.04403 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 156.3 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 1571 K (+1298°C / +2368°F) and receiving 649.43 S⊕ (~883,873 W/m²), WASP-175 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star WASP-175 is classified as a warm F-type star of spectral type F7 with an effective photospheric temperature of 6,229 K, a radius of 1.204 R☉, a mass of 1.212 M☉, an estimated bolometric luminosity of 1.958 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.745 Gyr and a metallicity of [Fe/H] = 0.15 dex (metal-rich relative to the Sun). From Earth, WASP-175 shines at apparent V-band magnitude 12.959 (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: WASP-South · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | WASP-175 |
| Spectral Type | F7 |
| Effective Temp (Teff) | 6,229 K |
| Stellar Radius | 1.2040 R☉ |
| Stellar Mass | 1.2120 M☉ |
| Bolometric Luminosity | 1.958 L☉ |
| Metallicity [Fe/H] | 0.150 dex |
| Stellar Age | 1.745 Gyr |
| Apparent Magnitude | V: 12.959 · G: 12.707 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.044030 AU |
| Orbital Period | 3.065 days |
| Mean Orbital Velocity | 156.3 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 85.3300° |
| Mean Bulk Density | 0.7 g/cm³ (53.9 km/s vesc) |
| Insolation Flux | 649.4290 S⊕ (~883,873 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1759.200 LY (539.360 pc) |