WASP-184 b

Astrophysical Synthesis & Habitability Characterization

WASP-184 b is a confirmed gas giant exoplanet orbiting the star WASP-184, located approximately 2163.2 light-years (663.23 parsecs) from the Solar System. First announced in 2019 by WASP-South using the Transit detection technique (producing an estimated primary transit depth of 0.6861% across the stellar disk), this world measures 14.908 Earth radii (1.33 Jupiter radii) and has a measured mass of 181.163 Earth masses (0.57 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.3 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.82 g⊕ (8.04 m/s²), and an escape velocity of 39 km/s.

In its orbital architecture around WASP-184, WASP-184 b completes one full revolution every 5.182 Earth days at a semi-major axis of 0.0627 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 131.6 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 1480 K (+1207°C / +2205°F) and receiving 669.02 S⊕ (~910,533 W/m²), WASP-184 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star WASP-184 is classified as a solar-type yellow star of spectral type G0 V with an effective photospheric temperature of 6,000 K, a radius of 1.65 R☉, a mass of 1.23 M☉, an estimated bolometric luminosity of 3.166 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.7 Gyr and a metallicity of [Fe/H] = 0.12 dex (metal-rich relative to the Sun). From Earth, WASP-184 shines at apparent V-band magnitude 12.771 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere.

Discovery Facility: WASP-South · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).