HD 112570 b
Astrophysical Synthesis & Habitability Characterization
HD 112570 b is a confirmed gas giant exoplanet orbiting the star HD 112570, located approximately 330 light-years (101.17 parsecs) from the Solar System. First announced in 2023 by Multiple Observatories using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 13.1 Earth radii (1.17 Jupiter radii) and has a measured mass of 1086.973 Earth masses (3.42 Jupiter masses). Combining its mass and radius yields a mean bulk density of 2.67 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 6.33 g⊕ (62.08 m/s²), and an escape velocity of 101.9 km/s.
In its orbital architecture around HD 112570, HD 112570 b completes one full revolution every 2615 Earth days (7.16Julian years) at a semi-major axis of 3.9 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 16.2 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.2 carries the world between 3.12 AU at periapsis and 4.68 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 364 K (+91°C / +196°F) and receiving 2.91 S⊕ (~3,966 W/m²), HD 112570 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star HD 112570 is classified as an orange K-type star of spectral type K0 III with an effective photospheric temperature of 4,750 K, a radius of 9.85 R☉, a mass of 1.15 M☉, an estimated bolometric luminosity of 44.314 L☉. Stellar evolution modeling indicates an estimated stellar age of 5.45 Gyr and a metallicity of [Fe/H] = -0.4 dex (metal-poor relative to the Sun). From Earth, HD 112570 shines at apparent V-band magnitude 6.111 (visible to the unaided human eye under dark skies) 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: Multiple Observatories · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | HD 112570 |
| Spectral Type | K0 III |
| Effective Temp (Teff) | 4,750 K |
| Stellar Radius | 9.8500 R☉ |
| Stellar Mass | 1.1500 M☉ |
| Bolometric Luminosity | 44.314 L☉ |
| Metallicity [Fe/H] | -0.400 dex |
| Stellar Age | 5.450 Gyr |
| Apparent Magnitude | V: 6.111 · G: 5.824 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 3.900000 AU |
| Orbital Period | 2615 days |
| Mean Orbital Velocity | 16.2 km/s |
| Orbital Eccentricity (e) | 0.20000 |
| Orbital Inclination (i) | 54.0000° |
| Mean Bulk Density | 2.67 g/cm³ (101.9 km/s vesc) |
| Insolation Flux | 2.9139 S⊕ (~3,966 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 330.000 LY (101.166 pc) |