EPIC 220554210 c
Astrophysical Synthesis & Habitability Characterization
EPIC 220554210 c is a confirmed super-earth exoplanet orbiting the star K2-282, located approximately 1618.7 light-years (496.29 parsecs) from the Solar System. First announced in 2019 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0215% 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 K2-282, EPIC 220554210 c completes one full revolution every 0.705 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for EPIC 220554210 c place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star K2-282 is classified as a stellar host with an effective photospheric temperature of 5,499 K, a radius of 1 R☉, a mass of 0.94 M☉, an estimated bolometric luminosity of 0.82 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.23 dex (metal-poor relative to the Sun). From Earth, K2-282 shines at apparent V-band magnitude 14.21 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The K2-282 system is a multi-planet architecture hosting 2 confirmed worlds, with EPIC 220554210 c sharing its stellar neighborhood alongside K2-282 b.
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 | K2-282 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,499 K |
| Stellar Radius | 1.0000 R☉ |
| Stellar Mass | 0.9400 M☉ |
| Bolometric Luminosity | 0.82 L☉ |
| Metallicity [Fe/H] | -0.230 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 14.210 · G: 13.818 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 0.705 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 91.3000° |
| Mean Bulk Density | 4.29 g/cm³ (15.8 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1618.700 LY (496.289 pc) |