2MASS J12073346-3932539 b
Astrophysical Synthesis & Habitability Characterization
2MASS J12073346-3932539 b is a confirmed gas giant exoplanet orbiting the star 2MASS J12073346-3932539, located approximately 209.7 light-years (64.31 parsecs) from the Solar System. First announced in 2004 by Paranal Observatory using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 15.693 Earth radii (1.4 Jupiter radii) and has a measured mass of 1652.708 Earth masses (5.2 Jupiter masses). Combining its mass and radius yields a mean bulk density of 2.36 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 6.71 g⊕ (65.8 m/s²), and an escape velocity of 114.8 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1163 K (+890°C / +1634°F), 2MASS J12073346-3932539 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star 2MASS J12073346-3932539 is classified as a low-mass red dwarf of spectral type M8 with an effective photospheric temperature of 2,825 K, a radius of 0.2189 R☉, a mass of 0.188 M☉, an estimated bolometric luminosity of 0.00274 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.01 Gyr. From Earth, 2MASS J12073346-3932539 shines at apparent V-band magnitude 20.15 (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: Paranal Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | 2MASS J12073346-3932539 |
| Spectral Type | M8 |
| Effective Temp (Teff) | 2,825 K |
| Stellar Radius | 0.2189 R☉ |
| Stellar Mass | 0.1880 M☉ |
| Bolometric Luminosity | 0.00274 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | 0.010 Gyr |
| Apparent Magnitude | V: 20.150 · G: 17.408 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 46.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 2.36 g/cm³ (114.8 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 209.700 LY (64.308 pc) |