GU Psc b
Astrophysical Synthesis & Habitability Characterization
GU Psc b is a confirmed gas giant exoplanet orbiting the star GU Psc, located approximately 155.1 light-years (47.55 parsecs) from the Solar System. First announced in 2014 by Gemini Observatory using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 14.179 Earth radii (1.26 Jupiter radii) and has a measured mass of 3591.3 Earth masses (11.3 Jupiter masses). Combining its mass and radius yields a mean bulk density of 6.95 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 17.86 g⊕ (175.15 m/s²), and an escape velocity of 178 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1050 K (+777°C / +1431°F), GU Psc b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star GU Psc is classified as a low-mass red dwarf of spectral type M3 with an effective photospheric temperature of 4,032 K, a radius of 0.4505 R☉, a mass of 0.325 M☉, an estimated bolometric luminosity of 0.048 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.1 Gyr and a metallicity of [Fe/H] = 0.1 dex (metal-rich relative to the Sun). From Earth, GU Psc shines at apparent V-band magnitude 14.146 (faint and requiring research-grade or CCD telescopic photometry) in the Northern 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: Gemini Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | GU Psc |
| Spectral Type | M3 |
| Effective Temp (Teff) | 4,032 K |
| Stellar Radius | 0.4505 R☉ |
| Stellar Mass | 0.3250 M☉ |
| Bolometric Luminosity | 0.048 L☉ |
| Metallicity [Fe/H] | 0.100 dex |
| Stellar Age | 0.100 Gyr |
| Apparent Magnitude | V: 14.146 · G: 12.966 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 2000.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 6.95 g/cm³ (178 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 155.100 LY (47.550 pc) |