2MASS J01225093-2439505 b
Astrophysical Synthesis & Habitability Characterization
2MASS J01225093-2439505 b is a confirmed gas giant exoplanet orbiting the star 2MASS J01225093-2439505, located approximately 110.3 light-years (33.83 parsecs) from the Solar System. First announced in 2013 by W. M. Keck Observatory using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 11.209 Earth radii (1 Jupiter radii) and has a measured mass of 7786.5 Earth masses (24.5 Jupiter masses). Combining its mass and radius yields a mean bulk density of 30.49 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 61.97 g⊕ (607.72 m/s²), and an escape velocity of 294.8 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1600 K (+1327°C / +2421°F), 2MASS J01225093-2439505 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star 2MASS J01225093-2439505 is classified as a low-mass red dwarf of spectral type M3.5 V with an effective photospheric temperature of 3,530 K, a radius of 0.3665 R☉, a mass of 0.4 M☉, an estimated bolometric luminosity of 0.019 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.12 Gyr. From Earth, 2MASS J01225093-2439505 shines at apparent V-band magnitude 14.244 (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: W. M. Keck Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | 2MASS J01225093-2439505 |
| Spectral Type | M3.5 V |
| Effective Temp (Teff) | 3,530 K |
| Stellar Radius | 0.3665 R☉ |
| Stellar Mass | 0.4000 M☉ |
| Bolometric Luminosity | 0.019 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | 0.120 Gyr |
| Apparent Magnitude | V: 14.244 · G: 12.903 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 52.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 30.49 g/cm³ (294.8 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 110.300 LY (33.828 pc) |