HD 284149 AB b
Astrophysical Synthesis & Habitability Characterization
HD 284149 AB b is a confirmed gas giant exoplanet orbiting the star HD 284149 A, located approximately 384.2 light-years (117.81 parsecs) from the Solar System. First announced in 2017 by Paranal Observatory using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 12 Earth radii (1.07 Jupiter radii) and has a measured mass of 8352.531 Earth masses (26.28 Jupiter masses). Combining its mass and radius yields a mean bulk density of 26.65 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 58 g⊕ (568.79 m/s²), and an escape velocity of 295.1 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 2395 K (+2122°C / +3852°F), HD 284149 AB b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star HD 284149 A is classified as a stellar host with an effective photospheric temperature of 6,035 K, a radius of 1.36 R☉, a mass of 1.13 M☉, an estimated bolometric luminosity of 2.201 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.025 Gyr. From Earth, HD 284149 A shines at apparent V-band magnitude 9.57 (accessible to binoculars and small amateur telescopes) 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: Paranal Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | HD 284149 A |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,035 K |
| Stellar Radius | 1.3600 R☉ |
| Stellar Mass | 1.1300 M☉ |
| Bolometric Luminosity | 2.201 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | 0.025 Gyr |
| Apparent Magnitude | V: 9.570 · G: 9.420 |
| System Architecture | 2 Stars, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 431.160000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 26.65 g/cm³ (295.1 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 384.200 LY (117.807 pc) |