K2-371 b
Astrophysical Synthesis & Habitability Characterization
K2-371 b is a confirmed gas giant exoplanet orbiting the star K2-371, located approximately 1444.3 light-years (442.81 parsecs) from the Solar System. First announced in 2022 by K2 using the Transit detection technique (producing an estimated primary transit depth of 2.6319% across the stellar disk), this world has a measured radius of 13.024 Earth radii (1.16 R♃), though radial-velocity mass constraints remain unmeasured in the current composite catalogue.
In its orbital architecture around K2-371, K2-371 b completes one full revolution every 3.115 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 957 K (+684°C / +1263°F) and receiving 198.09 S⊕ (~269,603 W/m²), K2-371 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star K2-371 is classified as a stellar host with an effective photospheric temperature of 4,925 K, a radius of 0.736 R☉, a mass of 0.958 M☉, an estimated bolometric luminosity of 0.286 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.107 dex (metal-poor relative to the Sun). From Earth, K2-371 shines at apparent V-band magnitude 14.492 (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: K2 · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | K2-371 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,925 K |
| Stellar Radius | 0.7360 R☉ |
| Stellar Mass | 0.9580 M☉ |
| Bolometric Luminosity | 0.286 L☉ |
| Metallicity [Fe/H] | -0.107 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 14.492 · G: 14.394 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 3.115 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Insolation Flux | 198.0922 S⊕ (~269,603 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1444.300 LY (442.813 pc) |