WASP-107 c
Astrophysical Synthesis & Habitability Characterization
WASP-107 c is a confirmed gas giant exoplanet orbiting the star WASP-107, located approximately 211.2 light-years (64.74 parsecs) from the Solar System. First announced in 2020 by Multiple Observatories using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 13 Earth radii (1.16 Jupiter radii) and has a measured mass of 111.24 Earth masses (0.35 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.28 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.66 g⊕ (6.47 m/s²), and an escape velocity of 32.7 km/s.
In its orbital architecture around WASP-107, WASP-107 c completes one full revolution every 1091 Earth days (2.99Julian years). The planet follows a highly eccentric trajectory (e = 0.315), pointing to past dynamical scattering or secular gravitational perturbations.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 13.000 R⊕, WASP-107 c exceeds the empirical ~1.8–2.2 R⊕ Fulton radius valley threshold, indicating a substantial hydrogen-helium or supercritical volatile envelope without a conventional solid terrestrial surface.
The host star WASP-107 is classified as an orange K-type star of spectral type K6 with an effective photospheric temperature of 4,425 K, a radius of 0.657 R☉, a mass of 0.683 M☉, an estimated bolometric luminosity of 0.148 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.4 Gyr and a metallicity of [Fe/H] = 0.02 dex (near-solar heavy-element abundance). From Earth, WASP-107 shines at apparent V-band magnitude 11.592 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere. The WASP-107 system is a multi-planet architecture hosting 2 confirmed worlds, with WASP-107 c sharing its stellar neighborhood alongside WASP-107 b.
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 | WASP-107 |
| Spectral Type | K6 |
| Effective Temp (Teff) | 4,425 K |
| Stellar Radius | 0.6570 R☉ |
| Stellar Mass | 0.6830 M☉ |
| Bolometric Luminosity | 0.148 L☉ |
| Metallicity [Fe/H] | 0.020 dex |
| Stellar Age | 3.400 Gyr |
| Apparent Magnitude | V: 11.592 · G: 11.174 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 1091 days |
| Orbital Eccentricity (e) | 0.31500 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 0.28 g/cm³ (32.7 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 211.200 LY (64.741 pc) |