EPIC 220492298 b
Astrophysical Synthesis & Habitability Characterization
EPIC 220492298 b is a confirmed terrestrial exoplanet orbiting the star EPIC 220492298, located approximately 2036.9 light-years (624.51 parsecs) from the Solar System. First announced in 2021 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0104% across the stellar disk), this world measures 0.99 Earth radii and has a measured mass of 0.937 Earth masses. Combining its mass and radius yields a mean bulk density of 5.32 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 0.96 g⊕ (9.41 m/s²), and an escape velocity of 10.9 km/s.
In its orbital architecture around EPIC 220492298, EPIC 220492298 b completes one full revolution every 0.762 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for EPIC 220492298 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star EPIC 220492298 is classified as a stellar host with an effective photospheric temperature of 5,620 K, a radius of 0.89 R☉, a mass of 0.95 M☉, an estimated bolometric luminosity of 0.709 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.28 dex (metal-rich relative to the Sun). From Earth, EPIC 220492298 shines at apparent V-band magnitude 13.991 (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 | EPIC 220492298 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,620 K |
| Stellar Radius | 0.8900 R☉ |
| Stellar Mass | 0.9500 M☉ |
| Bolometric Luminosity | 0.709 L☉ |
| Metallicity [Fe/H] | 0.280 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 13.991 · G: 13.776 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 0.762 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 92.6000° |
| Mean Bulk Density | 5.32 g/cm³ (10.9 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2036.900 LY (624.512 pc) |