WASP-113 b
Astrophysical Synthesis & Habitability Characterization
WASP-113 b is a confirmed gas giant exoplanet orbiting the star WASP-113, located approximately 1419.3 light-years (435.16 parsecs) from the Solar System. First announced in 2016 by SuperWASP-North using the Transit detection technique (producing an estimated primary transit depth of 0.8108% across the stellar disk), this world measures 15.793 Earth radii (1.41 Jupiter radii) and has a measured mass of 150.969 Earth masses (0.47 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.21 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.61 g⊕ (5.98 m/s²), and an escape velocity of 34.6 km/s.
In its orbital architecture around WASP-113, WASP-113 b completes one full revolution every 4.542 Earth days at a semi-major axis of 0.05885 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 141 km/s (compared to Earth's 29.8 km/s). The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1496 K (+1223°C / +2233°F) and receiving 821.41 S⊕ (~1,117,932 W/m²), WASP-113 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star WASP-113 is classified as a solar-type yellow star of spectral type G1 with an effective photospheric temperature of 5,890 K, a radius of 1.608 R☉, a mass of 1.318 M☉, an estimated bolometric luminosity of 2.792 L☉. Stellar evolution modeling indicates an estimated stellar age of 6.2 Gyr and a metallicity of [Fe/H] = 0.1 dex (metal-rich relative to the Sun). From Earth, WASP-113 shines at apparent V-band magnitude 11.761 (faint and requiring research-grade or CCD telescopic photometry) 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: SuperWASP-North · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | WASP-113 |
| Spectral Type | G1 |
| Effective Temp (Teff) | 5,890 K |
| Stellar Radius | 1.6080 R☉ |
| Stellar Mass | 1.3180 M☉ |
| Bolometric Luminosity | 2.792 L☉ |
| Metallicity [Fe/H] | 0.100 dex |
| Stellar Age | 6.200 Gyr |
| Apparent Magnitude | V: 11.761 · G: 11.604 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.058850 AU |
| Orbital Period | 4.542 days |
| Mean Orbital Velocity | 141 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 86.4600° |
| Mean Bulk Density | 0.21 g/cm³ (34.6 km/s vesc) |
| Insolation Flux | 821.4050 S⊕ (~1,117,932 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1419.300 LY (435.156 pc) |