EPIC 212499991 b
Astrophysical Synthesis & Habitability Characterization
EPIC 212499991 b is a confirmed super-earth exoplanet orbiting the star EPIC 212499991, located approximately 924 light-years (283.29 parsecs) from the Solar System. First announced in 2019 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0375% across the stellar disk), this world measures 1.6 Earth radii and has a measured mass of 3.19 Earth masses. Combining its mass and radius yields a mean bulk density of 4.29 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.25 g⊕ (12.26 m/s²), and an escape velocity of 15.8 km/s.
In its orbital architecture around EPIC 212499991, EPIC 212499991 b completes one full revolution every 34.885 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for EPIC 212499991 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star EPIC 212499991 is classified as a stellar host with an effective photospheric temperature of 4,983 K, a radius of 0.7575 R☉, a mass of 0.912 M☉, an estimated bolometric luminosity of 0.317 L☉. From Earth, EPIC 212499991 shines at apparent V-band magnitude 13.672 (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 212499991 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,983 K |
| Stellar Radius | 0.7575 R☉ |
| Stellar Mass | 0.9120 M☉ |
| Bolometric Luminosity | 0.317 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 13.672 · G: 13.312 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 34.885 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 4.29 g/cm³ (15.8 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 924.000 LY (283.290 pc) |