HIP 79098 AB b
Astrophysical Synthesis & Habitability Characterization
HIP 79098 AB b is a confirmed gas giant exoplanet orbiting the star HIP 79098 AB, located approximately 475.5 light-years (145.8 parsecs) from the Solar System. First announced in 2019 by Paranal Observatory 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 6515.515 Earth masses (20.5 Jupiter masses). Combining its mass and radius yields a mean bulk density of 20.28 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 44.5 g⊕ (436.4 m/s²), and an escape velocity of 259.6 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 2450 K (+2177°C / +3951°F), HIP 79098 AB b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star HIP 79098 AB is classified as a massive B-type star of spectral type B9 V with an effective photospheric temperature of 9,194 K, a mass of 3.75 M☉. Stellar evolution modeling indicates an estimated stellar age of 0.01 Gyr. From Earth, HIP 79098 AB shines at apparent V-band magnitude 5.86 (visible to the unaided human eye under dark skies) 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 | HIP 79098 AB |
| Spectral Type | B9 V |
| Effective Temp (Teff) | 9,194 K |
| Stellar Radius | — |
| Stellar Mass | 3.7500 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | 0.010 Gyr |
| Apparent Magnitude | V: 5.860 · G: 5.839 |
| System Architecture | 2 Stars, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 345.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 20.28 g/cm³ (259.6 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 475.500 LY (145.798 pc) |