HD 95086 b
Astrophysical Synthesis & Habitability Characterization
HD 95086 b is a confirmed gas giant exoplanet orbiting the star HD 95086, located approximately 281.2 light-years (86.23 parsecs) from the Solar System. First announced in 2013 by Paranal Observatory using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 12.9 Earth radii (1.15 Jupiter radii) and has a measured mass of 1589 Earth masses (5 Jupiter masses). Combining its mass and radius yields a mean bulk density of 4.08 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 9.55 g⊕ (93.65 m/s²), and an escape velocity of 124.1 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1000 K (+727°C / +1341°F) and receiving 0.00 S⊕ (~3 W/m²), HD 95086 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star HD 95086 is classified as a luminous A-type star of spectral type A8 III with an effective photospheric temperature of 7,595 K, a radius of 1.4867 R☉, a mass of 1.6 M☉, an estimated bolometric luminosity of 6.599 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.017 Gyr and a metallicity of [Fe/H] = 0.14 dex (metal-rich relative to the Sun). From Earth, HD 95086 shines at apparent V-band magnitude 7.36 (accessible to binoculars and small amateur telescopes) 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 | HD 95086 |
| Spectral Type | A8 III |
| Effective Temp (Teff) | 7,595 K |
| Stellar Radius | 1.4867 R☉ |
| Stellar Mass | 1.6000 M☉ |
| Bolometric Luminosity | 6.599 L☉ |
| Metallicity [Fe/H] | 0.140 dex |
| Stellar Age | 0.017 Gyr |
| Apparent Magnitude | V: 7.360 · G: 7.309 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 55.700000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 4.08 g/cm³ (124.1 km/s vesc) |
| Insolation Flux | 0.0021 S⊕ (~3 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 281.200 LY (86.228 pc) |