HD 110537 b
Astrophysical Synthesis & Habitability Characterization
HD 110537 b is a confirmed gas giant exoplanet orbiting the star HD 110537, located approximately 147.1 light-years (45.09 parsecs) from the Solar System. First announced in 2022 by Multiple Observatories using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 11.9 Earth radii (1.06 Jupiter radii) and has a measured mass of 8612.832 Earth masses (27.1 Jupiter masses). Combining its mass and radius yields a mean bulk density of 28.18 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 60.82 g⊕ (596.44 m/s²), and an escape velocity of 300.9 km/s.
In its orbital architecture around HD 110537, HD 110537 b completes one full revolution every 24469.673 Earth days (66.99Julian years) at a semi-major axis of 16.714 AU (a wide outer-system orbit beyond Jupiter's 5.20 AU distance in our Solar System). Its mean orbital velocity is approximately 7.4 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.401, swinging from 10.0117 AU at periapsis out to 23.4163 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 73 K (-200°C / -328°F) and an incident flux of 0.00 S⊕ (~6 W/m²), surface water and volatile species on HD 110537 b would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.
The host star HD 110537 is classified as a solar-type yellow star of spectral type G6/8 V with an effective photospheric temperature of 5,718 K, a radius of 1.1663 R☉, a mass of 1.02 M☉, an estimated bolometric luminosity of 1.305 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.09 dex (metal-rich relative to the Sun). From Earth, HD 110537 shines at apparent V-band magnitude 7.83 (accessible to binoculars and small amateur telescopes) 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: Multiple Observatories · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | HD 110537 |
| Spectral Type | G6/8 V |
| Effective Temp (Teff) | 5,718 K |
| Stellar Radius | 1.1663 R☉ |
| Stellar Mass | 1.0200 M☉ |
| Bolometric Luminosity | 1.305 L☉ |
| Metallicity [Fe/H] | 0.090 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 7.830 · G: 7.661 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 16.714000 AU |
| Orbital Period | 24469.673 days |
| Mean Orbital Velocity | 7.4 km/s |
| Orbital Eccentricity (e) | 0.40100 |
| Orbital Inclination (i) | 51.8910° |
| Mean Bulk Density | 28.18 g/cm³ (300.9 km/s vesc) |
| Insolation Flux | 0.0047 S⊕ (~6 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 147.100 LY (45.086 pc) |