HD 7199 b

Astrophysical Synthesis & Habitability Characterization

HD 7199 b is a confirmed gas giant exoplanet orbiting the star HD 7199, located approximately 117.9 light-years (36.15 parsecs) from the Solar System. First announced in 2011 by La Silla Observatory using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world has a minimum or true mass of 3639.135 Earth masses (11.45 M♃), while its physical transit radius has not yet been geometrically observed.

In its orbital architecture around HD 7199, HD 7199 b completes one full revolution every 615 Earth days (1.68Julian years) at a semi-major axis of 1.36 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 24.1 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.19 carries the world between 1.1016 AU at periapsis and 1.6184 AU at apoapsis, driving measurable seasonal insolation cycles.

✓ Classified as a Temperate Habitable Zone Candidate.

With an estimated equilibrium temperature of 219 K (-54°C / -65°F) and an incident stellar irradiance of 0.38 S⊕ (~515 W/m²), HD 7199 b orbits within the empirical circumstellar habitable zone where a rocky surface under sufficient atmospheric pressure can maintain liquid surface water.

The host star HD 7199 is classified as an orange K-type star of spectral type K1 IV with an effective photospheric temperature of 5,371 K, a radius of 0.97 R☉, a mass of 0.77 M☉, an estimated bolometric luminosity of 0.703 L☉. Stellar evolution modeling indicates an estimated stellar age of 6.79 Gyr and a metallicity of [Fe/H] = 0.32 dex (metal-rich relative to the Sun). From Earth, HD 7199 shines at apparent V-band magnitude 8.06 (accessible to binoculars and small amateur telescopes) in the Southern celestial hemisphere.

Discovery Facility: La Silla Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).