EPIC 212424622 b
Astrophysical Synthesis & Habitability Characterization
EPIC 212424622 b is a confirmed sub-neptune exoplanet orbiting the star EPIC 212424622, located approximately 1995.4 light-years (611.8 parsecs) from the Solar System. First announced in 2019 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0264% across the stellar disk), this world measures 2.17 Earth radii and has a measured mass of 5.35 Earth masses. Combining its mass and radius yields a mean bulk density of 2.89 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.14 g⊕ (11.18 m/s²), and an escape velocity of 17.6 km/s.
In its orbital architecture around EPIC 212424622, EPIC 212424622 b completes one full revolution every 18.098 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for EPIC 212424622 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star EPIC 212424622 is classified as a stellar host with an effective photospheric temperature of 5,782 K, a radius of 1.2247 R☉, a mass of 1.106 M☉, an estimated bolometric luminosity of 1.504 L☉. From Earth, EPIC 212424622 shines at apparent V-band magnitude 13.441 (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 | EPIC 212424622 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,782 K |
| Stellar Radius | 1.2247 R☉ |
| Stellar Mass | 1.1060 M☉ |
| Bolometric Luminosity | 1.504 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 13.441 · G: 13.203 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 18.098 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 2.89 g/cm³ (17.6 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1995.400 LY (611.804 pc) |