2MASS J11550485-7919108 b
Astrophysical Synthesis & Habitability Characterization
2MASS J11550485-7919108 b is a confirmed gas giant exoplanet orbiting the star 2MASS J11550485-7919108, located approximately 329 light-years (100.86 parsecs) from the Solar System. First announced in 2024 by European Space Agency (ESA) Gaia Satellite 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 6356.568 Earth masses (20 Jupiter masses). Combining its mass and radius yields a mean bulk density of 19.78 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 43.42 g⊕ (425.8 m/s²), and an escape velocity of 256.4 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 2506 K (+2233°C / +4051°F), 2MASS J11550485-7919108 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star 2MASS J11550485-7919108 is classified as a stellar host with an effective photospheric temperature of 3,021 K, a radius of 0.6005 R☉, a mass of 0.5885 M☉, an estimated bolometric luminosity of 0.027 L☉. From Earth, 2MASS J11550485-7919108 shines at apparent V-band magnitude 16.957 (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: European Space Agency (ESA) Gaia Satellite · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | 2MASS J11550485-7919108 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,021 K |
| Stellar Radius | 0.6005 R☉ |
| Stellar Mass | 0.5885 M☉ |
| Bolometric Luminosity | 0.027 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 16.957 · G: 14.818 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 587.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 19.78 g/cm³ (256.4 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 329.000 LY (100.862 pc) |