K2-392 b
Astrophysical Synthesis & Habitability Characterization
K2-392 b is a confirmed super-earth exoplanet orbiting the star K2-392, located approximately 1327.4 light-years (406.99 parsecs) from the Solar System. First announced in 2022 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0257% across the stellar disk), this world measures 1.85 Earth radii and has a measured mass of 4.08 Earth masses. Combining its mass and radius yields a mean bulk density of 3.55 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.19 g⊕ (11.67 m/s²), and an escape velocity of 16.6 km/s.
In its orbital architecture around K2-392, K2-392 b completes one full revolution every 15.399 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for K2-392 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star K2-392 is classified as a solar-type yellow star of spectral type G3 with an effective photospheric temperature of 5,726 K, a radius of 1.058 R☉, a mass of 0.841 M☉, an estimated bolometric luminosity of 1.08 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.238 dex (metal-poor relative to the Sun). From Earth, K2-392 shines at apparent V-band magnitude 12.922 (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 | K2-392 |
| Spectral Type | G3 |
| Effective Temp (Teff) | 5,726 K |
| Stellar Radius | 1.0580 R☉ |
| Stellar Mass | 0.8410 M☉ |
| Bolometric Luminosity | 1.08 L☉ |
| Metallicity [Fe/H] | -0.238 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 12.922 · G: 12.680 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 15.399 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 3.55 g/cm³ (16.6 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1327.400 LY (406.985 pc) |