HATS-41 b
Astrophysical Synthesis & Habitability Characterization
HATS-41 b is a confirmed gas giant exoplanet orbiting the star HATS-41, located approximately 2405.9 light-years (737.67 parsecs) from the Solar System. First announced in 2018 by HATSouth using the Transit detection technique (producing an estimated primary transit depth of 0.6388% across the stellar disk), this world measures 14.908 Earth radii (1.33 Jupiter radii) and has a measured mass of 3082.951 Earth masses (9.7 Jupiter masses). Combining its mass and radius yields a mean bulk density of 5.13 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 13.87 g⊕ (136.02 m/s²), and an escape velocity of 160.9 km/s.
In its orbital architecture around HATS-41, HATS-41 b completes one full revolution every 4.194 Earth days at a semi-major axis of 0.0583 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 151.2 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.38, swinging from 0.0361 AU at periapsis out to 0.0805 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1710 K (+1437°C / +2619°F) and receiving 1,300.31 S⊕ (~1,769,725 W/m²), HATS-41 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star HATS-41 is classified as a stellar host with an effective photospheric temperature of 6,424 K, a radius of 1.71 R☉, a mass of 1.496 M☉, an estimated bolometric luminosity of 4.468 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.34 Gyr and a metallicity of [Fe/H] = 0.47 dex (metal-rich relative to the Sun). From Earth, HATS-41 shines at apparent V-band magnitude 12.678 (faint and requiring research-grade or CCD telescopic photometry) 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: HATSouth · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | HATS-41 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,424 K |
| Stellar Radius | 1.7100 R☉ |
| Stellar Mass | 1.4960 M☉ |
| Bolometric Luminosity | 4.468 L☉ |
| Metallicity [Fe/H] | 0.470 dex |
| Stellar Age | 1.340 Gyr |
| Apparent Magnitude | V: 12.678 · G: 12.589 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.058300 AU |
| Orbital Period | 4.194 days |
| Mean Orbital Velocity | 151.2 km/s |
| Orbital Eccentricity (e) | 0.38000 |
| Orbital Inclination (i) | 80.4000° |
| Mean Bulk Density | 5.13 g/cm³ (160.9 km/s vesc) |
| Insolation Flux | 1300.3125 S⊕ (~1,769,725 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2405.900 LY (737.668 pc) |