CWISEP J193518.59-154620.3 b
Astrophysical Synthesis & Habitability Characterization
CWISEP J193518.59-154620.3 b is a confirmed gas giant exoplanet orbiting the star CWISEP J193518.59-154620.3, located approximately 47.1 light-years (14.43 parsecs) from the Solar System. First announced in 2025 by James Webb Space Telescope (JWST) using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 12.2 Earth radii (1.09 Jupiter radii) and has a measured mass of 4926.34 Earth masses (15.5 Jupiter masses). Combining its mass and radius yields a mean bulk density of 14.96 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 33.1 g⊕ (324.6 m/s²), and an escape velocity of 224.8 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 390 K (+117°C / +243°F), CWISEP J193518.59-154620.3 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star CWISEP J193518.59-154620.3 is classified as a catalogued stellar host of spectral type Y with a mass of 0.024 M☉. Stellar evolution modeling indicates an estimated stellar age of 5.5 Gyr.
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: James Webb Space Telescope (JWST) · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | CWISEP J193518.59-154620.3 |
| Spectral Type | Y |
| Effective Temp (Teff) | — |
| Stellar Radius | — |
| Stellar Mass | 0.0240 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | 5.500 Gyr |
| Apparent Magnitude | — |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 2.480000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 14.96 g/cm³ (224.8 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 47.100 LY (14.430 pc) |