EPIC 201497682 b
Astrophysical Synthesis & Habitability Characterization
EPIC 201497682 b is a confirmed sub-earth exoplanet orbiting the star EPIC 201497682, located approximately 825.3 light-years (253.03 parsecs) from the Solar System. First announced in 2019 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0131% across the stellar disk), this world measures 0.692 Earth radii and has a measured mass of 0.26 Earth masses. Combining its mass and radius yields a mean bulk density of 4.33 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 0.54 g⊕ (5.3 m/s²), and an escape velocity of 6.9 km/s.
In its orbital architecture around EPIC 201497682, EPIC 201497682 b completes one full revolution every 2.132 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for EPIC 201497682 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star EPIC 201497682 is classified as a stellar host with an effective photospheric temperature of 4,991 K, a radius of 0.554 R☉, a mass of 0.78 M☉, an estimated bolometric luminosity of 0.171 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.089 dex (near-solar heavy-element abundance). From Earth, EPIC 201497682 shines at apparent V-band magnitude 13.948 (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 201497682 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,991 K |
| Stellar Radius | 0.5540 R☉ |
| Stellar Mass | 0.7800 M☉ |
| Bolometric Luminosity | 0.171 L☉ |
| Metallicity [Fe/H] | -0.089 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 13.948 · G: 13.737 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 2.132 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 4.33 g/cm³ (6.9 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 825.300 LY (253.026 pc) |