EPIC 206317286 c
Astrophysical Synthesis & Habitability Characterization
EPIC 206317286 c is a confirmed sub-neptune exoplanet orbiting the star EPIC 206317286, located approximately 1025.3 light-years (314.35 parsecs) from the Solar System. First announced in 2022 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0641% across the stellar disk), this world measures 2.094 Earth radii and has a measured mass of 5.03 Earth masses. Combining its mass and radius yields a mean bulk density of 3.02 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.15 g⊕ (11.28 m/s²), and an escape velocity of 17.3 km/s.
In its orbital architecture around EPIC 206317286, EPIC 206317286 c completes one full revolution every 17.515 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for EPIC 206317286 c place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star EPIC 206317286 is classified as a stellar host with an effective photospheric temperature of 4,752 K, a radius of 0.758 R☉, a mass of 0.832 M☉, an estimated bolometric luminosity of 0.263 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.019 dex (near-solar heavy-element abundance). From Earth, EPIC 206317286 shines at apparent V-band magnitude 14.005 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere. The EPIC 206317286 system is a multi-planet architecture hosting 2 confirmed worlds, with EPIC 206317286 c sharing its stellar neighborhood alongside EPIC 206317286 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 | EPIC 206317286 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,752 K |
| Stellar Radius | 0.7580 R☉ |
| Stellar Mass | 0.8320 M☉ |
| Bolometric Luminosity | 0.263 L☉ |
| Metallicity [Fe/H] | 0.019 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 14.005 · G: 13.774 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 17.515 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 3.02 g/cm³ (17.3 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1025.300 LY (314.350 pc) |