HIP 14810 d
Astrophysical Synthesis & Habitability Characterization
HIP 14810 d is a confirmed gas giant exoplanet orbiting the star HIP 14810, located approximately 164.6 light-years (50.48 parsecs) from the Solar System. First announced in 2009 by W. M. Keck Observatory using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 14.1 Earth radii (1.26 Jupiter radii) and has a measured mass of 187.52 Earth masses (0.59 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.37 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.94 g⊕ (9.22 m/s²), and an escape velocity of 40.8 km/s.
In its orbital architecture around HIP 14810, HIP 14810 d completes one full revolution every 981.8 Earth days (2.69Julian years) at a semi-major axis of 1.94 AU (corresponding to the middle-system regime between Mars at 1.52 AU and Jupiter at 5.20 AU). Its mean orbital velocity is approximately 21.5 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.185 carries the world between 1.5811 AU at periapsis and 2.2989 AU at apoapsis, driving measurable seasonal insolation cycles.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 14.100 R⊕, HIP 14810 d exceeds the empirical ~1.8–2.2 R⊕ Fulton radius valley threshold, indicating a substantial hydrogen-helium or supercritical volatile envelope without a conventional solid terrestrial surface.
The host star HIP 14810 is classified as a solar-type yellow star of spectral type G5 with an effective photospheric temperature of 5,544 K, a radius of 1.07 R☉, a mass of 1.01 M☉, an estimated bolometric luminosity of 0.97 L☉. Stellar evolution modeling indicates an estimated stellar age of 5.84 Gyr and a metallicity of [Fe/H] = 0.24 dex (metal-rich relative to the Sun). From Earth, HIP 14810 shines at apparent V-band magnitude 8.52 (accessible to binoculars and small amateur telescopes) in the Northern celestial hemisphere. The HIP 14810 system is a multi-planet architecture hosting 3 confirmed worlds, with HIP 14810 d sharing its stellar neighborhood alongside HIP 14810 b, HIP 14810 c.
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: W. M. Keck Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | HIP 14810 |
| Spectral Type | G5 |
| Effective Temp (Teff) | 5,544 K |
| Stellar Radius | 1.0700 R☉ |
| Stellar Mass | 1.0100 M☉ |
| Bolometric Luminosity | 0.97 L☉ |
| Metallicity [Fe/H] | 0.240 dex |
| Stellar Age | 5.840 Gyr |
| Apparent Magnitude | V: 8.520 · G: 8.333 |
| System Architecture | 1 Star, 3 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 1.940000 AU |
| Orbital Period | 981.8 days |
| Mean Orbital Velocity | 21.5 km/s |
| Orbital Eccentricity (e) | 0.18500 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 0.37 g/cm³ (40.8 km/s vesc) |
| Insolation Flux | 0.2597 S⊕ (~353 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 164.600 LY (50.480 pc) |