HD 17092 b
Astrophysical Synthesis & Habitability Characterization
HD 17092 b is a confirmed gas giant exoplanet orbiting the star HD 17092, located approximately 745 light-years (228.42 parsecs) from the Solar System. First announced in 2007 by McDonald Observatory using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 12.5 Earth radii (1.12 Jupiter radii) and has a measured mass of 3219.618 Earth masses (10.13 Jupiter masses). Combining its mass and radius yields a mean bulk density of 9.09 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 20.61 g⊕ (202.12 m/s²), and an escape velocity of 179.5 km/s.
In its orbital architecture around HD 17092, HD 17092 b completes one full revolution every 359.9 Earth days at a semi-major axis of 1.31 AU (comparable to the inner terrestrial zone between Venus, Earth at 1.00 AU, and Mars at 1.52 AU). Its mean orbital velocity is approximately 39.6 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.17 carries the world between 1.0873 AU at periapsis and 1.5327 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 672 K (+399°C / +750°F) and receiving 33.20 S⊕ (~45,180 W/m²), HD 17092 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star HD 17092 is classified as an orange K-type star of spectral type K0 III with an effective photospheric temperature of 4,326 K, a radius of 13.58 R☉, a mass of 6.73 M☉, an estimated bolometric luminosity of 57.948 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.6 Gyr and a metallicity of [Fe/H] = 0.18 dex (metal-rich relative to the Sun). From Earth, HD 17092 shines at apparent V-band magnitude 7.732 (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: McDonald Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | HD 17092 |
| Spectral Type | K0 III |
| Effective Temp (Teff) | 4,326 K |
| Stellar Radius | 13.5800 R☉ |
| Stellar Mass | 6.7300 M☉ |
| Bolometric Luminosity | 57.948 L☉ |
| Metallicity [Fe/H] | 0.180 dex |
| Stellar Age | 2.600 Gyr |
| Apparent Magnitude | V: 7.732 · G: 7.340 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 1.310000 AU |
| Orbital Period | 359.9 days |
| Mean Orbital Velocity | 39.6 km/s |
| Orbital Eccentricity (e) | 0.17000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 9.09 g/cm³ (179.5 km/s vesc) |
| Insolation Flux | 33.1963 S⊕ (~45,180 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 745.000 LY (228.422 pc) |