WASP-195 b

Astrophysical Synthesis & Habitability Characterization

WASP-195 b is a confirmed gas giant exoplanet orbiting the star WASP-195, located approximately 1581.4 light-years (484.85 parsecs) from the Solar System. First announced in 2025 by SuperWASP using the Transit detection technique (producing an estimated primary transit depth of 0.3589% across the stellar disk), this world measures 10.312 Earth radii (0.92 Jupiter radii) and has a measured mass of 33.054 Earth masses (0.1 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.17 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.31 g⊕ (3.04 m/s²), and an escape velocity of 20 km/s.

In its orbital architecture around WASP-195, WASP-195 b completes one full revolution every 5.052 Earth days at a semi-major axis of 0.063 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 135.7 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 1522 K (+1249°C / +2280°F) and receiving 890.00 S⊕ (~1,211,290 W/m²), WASP-195 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star WASP-195 is classified as a stellar host with an effective photospheric temperature of 6,300 K, a radius of 1.578 R☉, a mass of 1.3 M☉, an estimated bolometric luminosity of 3.519 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.6 Gyr and a metallicity of [Fe/H] = 0 dex (near-solar heavy-element abundance). From Earth, WASP-195 shines at apparent V-band magnitude 11.947 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

Discovery Facility: SuperWASP · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).