K2-385 b
Astrophysical Synthesis & Habitability Characterization
K2-385 b is a confirmed super-earth exoplanet orbiting the star K2-385, located approximately 1372.5 light-years (420.82 parsecs) from the Solar System. First announced in 2022 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0344% across the stellar disk), this world measures 1.539 Earth radii and has a measured mass of 2.98 Earth masses. Combining its mass and radius yields a mean bulk density of 4.51 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.26 g⊕ (12.36 m/s²), and an escape velocity of 15.6 km/s.
In its orbital architecture around K2-385, K2-385 b completes one full revolution every 2.381 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for K2-385 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star K2-385 is classified as a stellar host with an effective photospheric temperature of 4,844 K, a radius of 0.761 R☉, a mass of 0.927 M☉, an estimated bolometric luminosity of 0.286 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.224 dex (metal-poor relative to the Sun). From Earth, K2-385 shines at apparent V-band magnitude 14.645 (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 | K2-385 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,844 K |
| Stellar Radius | 0.7610 R☉ |
| Stellar Mass | 0.9270 M☉ |
| Bolometric Luminosity | 0.286 L☉ |
| Metallicity [Fe/H] | -0.224 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 14.645 · G: 14.336 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 2.381 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 4.51 g/cm³ (15.6 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1372.500 LY (420.819 pc) |