UCAC3 113-933 b
Astrophysical Synthesis & Habitability Characterization
UCAC3 113-933 b is a confirmed gas giant exoplanet orbiting the star UCAC3 113-933, located approximately 171.5 light-years (52.58 parsecs) from the Solar System. First announced in 2024 by Multiple Observatories using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 12.1 Earth radii (1.08 Jupiter radii) and has a measured mass of 6674.397 Earth masses (21 Jupiter masses). Combining its mass and radius yields a mean bulk density of 20.77 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 45.59 g⊕ (447.09 m/s²), and an escape velocity of 262.7 km/s.
❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 2 K (-271°C / -456°F), surface water and volatile species on UCAC3 113-933 b would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.
The host star UCAC3 113-933 is classified as a low-mass red dwarf of spectral type M0 with an effective photospheric temperature of 3,864 K, a radius of 0.5645 R☉, a mass of 0.61 M☉, an estimated bolometric luminosity of 0.064 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.55 Gyr and a metallicity of [Fe/H] = -0.95 dex (metal-poor relative to the Sun). From Earth, UCAC3 113-933 shines at apparent V-band magnitude 12.501 (faint and requiring research-grade or CCD telescopic photometry) in the Southern 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: Multiple Observatories · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | UCAC3 113-933 |
| Spectral Type | M0 |
| Effective Temp (Teff) | 3,864 K |
| Stellar Radius | 0.5645 R☉ |
| Stellar Mass | 0.6100 M☉ |
| Bolometric Luminosity | 0.064 L☉ |
| Metallicity [Fe/H] | -0.950 dex |
| Stellar Age | 0.550 Gyr |
| Apparent Magnitude | V: 12.501 · G: 11.824 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 6100.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 20.77 g/cm³ (262.7 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 171.500 LY (52.583 pc) |