WISPIT 2 b
Astrophysical Synthesis & Habitability Characterization
WISPIT 2 b is a confirmed gas giant exoplanet orbiting the star WISPIT 2, located approximately 440 light-years (134.91 parsecs) from the Solar System. First announced in 2025 by Paranal Observatory using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 17.934 Earth radii (1.6 Jupiter radii) and has a measured mass of 1541.468 Earth masses (4.85 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.47 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 4.79 g⊕ (46.97 m/s²), and an escape velocity of 103.7 km/s.
❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 33 K (-240°C / -400°F) and an incident flux of 0.00 S⊕ (~0 W/m²), surface water and volatile species on WISPIT 2 b would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.
The host star WISPIT 2 is classified as a stellar host with an effective photospheric temperature of 4,400 K, a radius of 1.418 R☉, a mass of 1.08 M☉, an estimated bolometric luminosity of 0.676 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.005 Gyr. From Earth, WISPIT 2 shines at apparent V-band magnitude 11.598 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere. The WISPIT 2 system is a multi-planet architecture hosting 2 confirmed worlds, with WISPIT 2 b sharing its stellar neighborhood alongside WISPIT 2 c.
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: Paranal Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | WISPIT 2 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,400 K |
| Stellar Radius | 1.4180 R☉ |
| Stellar Mass | 1.0800 M☉ |
| Bolometric Luminosity | 0.676 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | 0.005 Gyr |
| Apparent Magnitude | V: 11.598 · G: 11.159 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 57.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.47 g/cm³ (103.7 km/s vesc) |
| Insolation Flux | 0.0002 S⊕ (~0 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 440.000 LY (134.907 pc) |