HD 150010 b
Astrophysical Synthesis & Habitability Characterization
HD 150010 b is a confirmed gas giant exoplanet orbiting the star HD 150010, located approximately 471.3 light-years (144.49 parsecs) from the Solar System. First announced in 2022 by Bohyunsan Optical Astronomical Observatory using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 13.3 Earth radii (1.19 Jupiter radii) and has a measured mass of 762.788 Earth masses (2.4 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.79 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 4.31 g⊕ (42.27 m/s²), and an escape velocity of 84.7 km/s.
In its orbital architecture around HD 150010, HD 150010 b completes one full revolution every 562 Earth days (1.54Julian years) at a semi-major axis of 1.4 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 27.1 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.2 carries the world between 1.12 AU at periapsis and 1.68 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 681 K (+408°C / +766°F) and receiving 48.98 S⊕ (~66,661 W/m²), HD 150010 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star HD 150010 is classified as an orange K-type star of spectral type K2 III with an effective photospheric temperature of 4,153 K, a radius of 16.2 R☉, a mass of 1.3 M☉, an estimated bolometric luminosity of 70.043 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.9 Gyr and a metallicity of [Fe/H] = -0.25 dex (metal-poor relative to the Sun). From Earth, HD 150010 shines at apparent V-band magnitude 6.289 (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: Bohyunsan Optical Astronomical Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | HD 150010 |
| Spectral Type | K2 III |
| Effective Temp (Teff) | 4,153 K |
| Stellar Radius | 16.2000 R☉ |
| Stellar Mass | 1.3000 M☉ |
| Bolometric Luminosity | 70.043 L☉ |
| Metallicity [Fe/H] | -0.250 dex |
| Stellar Age | 4.900 Gyr |
| Apparent Magnitude | V: 6.289 · G: 5.866 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 1.400000 AU |
| Orbital Period | 562 days |
| Mean Orbital Velocity | 27.1 km/s |
| Orbital Eccentricity (e) | 0.20000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.79 g/cm³ (84.7 km/s vesc) |
| Insolation Flux | 48.9796 S⊕ (~66,661 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 471.300 LY (144.490 pc) |