WD 0806-661 b
Astrophysical Synthesis & Habitability Characterization
WD 0806-661 b is a confirmed gas giant exoplanet orbiting the star WD 0806-661, located approximately 62.8 light-years (19.24 parsecs) from the Solar System. First announced in 2011 by Spitzer Space Telescope using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 12.106 Earth radii (1.08 Jupiter radii) and has a measured mass of 2224.799 Earth masses (7 Jupiter masses). Combining its mass and radius yields a mean bulk density of 6.91 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 15.18 g⊕ (148.86 m/s²), and an escape velocity of 151.6 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 357 K (+84°C / +183°F), WD 0806-661 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star WD 0806-661 is classified as a catalogued stellar host of spectral type DQ with an effective photospheric temperature of 10,393 K, a mass of 0.605 M☉. Stellar evolution modeling indicates an estimated stellar age of 1.6 Gyr. From Earth, WD 0806-661 shines at apparent V-band magnitude 13.855 (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: Spitzer Space Telescope · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | WD 0806-661 |
| Spectral Type | DQ |
| Effective Temp (Teff) | 10,393 K |
| Stellar Radius | — |
| Stellar Mass | 0.6050 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | 1.600 Gyr |
| Apparent Magnitude | V: 13.855 · G: 13.683 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 2500.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 6.91 g/cm³ (151.6 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 62.800 LY (19.244 pc) |