K2-382 b
Astrophysical Synthesis & Habitability Characterization
K2-382 b is a confirmed sub-neptune exoplanet orbiting the star K2-382, located approximately 908.1 light-years (278.41 parsecs) from the Solar System. First announced in 2022 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0549% across the stellar disk), this world measures 2.072 Earth radii and has a measured mass of 4.95 Earth masses. Combining its mass and radius yields a mean bulk density of 3.07 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.15 g⊕ (11.28 m/s²), and an escape velocity of 17.3 km/s.
In its orbital architecture around K2-382, K2-382 b completes one full revolution every 21.7 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for K2-382 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star K2-382 is classified as a stellar host with an effective photospheric temperature of 5,452 K, a radius of 0.811 R☉, a mass of 0.922 M☉, an estimated bolometric luminosity of 0.521 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.027 dex (near-solar heavy-element abundance). From Earth, K2-382 shines at apparent V-band magnitude 12.977 (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: K2 · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | K2-382 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,452 K |
| Stellar Radius | 0.8110 R☉ |
| Stellar Mass | 0.9220 M☉ |
| Bolometric Luminosity | 0.521 L☉ |
| Metallicity [Fe/H] | -0.027 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 12.977 · G: 12.767 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 21.7 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 88.2977° |
| Mean Bulk Density | 3.07 g/cm³ (17.3 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 908.100 LY (278.412 pc) |