EPIC 206024342 d
Astrophysical Synthesis & Habitability Characterization
EPIC 206024342 d is a confirmed sub-neptune exoplanet orbiting the star EPIC 206024342, located approximately 1206.4 light-years (369.89 parsecs) from the Solar System. First announced in 2021 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.047% across the stellar disk), this world measures 2.6 Earth radii and has a measured mass of 7.27 Earth masses. Combining its mass and radius yields a mean bulk density of 2.28 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.08 g⊕ (10.59 m/s²), and an escape velocity of 18.7 km/s.
In its orbital architecture around EPIC 206024342, EPIC 206024342 d completes one full revolution every 14.648 Earth days.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 2.600 R⊕, EPIC 206024342 d exceeds the empirical ~1.8–2.2 R⊕ Fulton radius valley threshold, indicating a substantial hydrogen-helium or supercritical volatile envelope without a conventional solid terrestrial surface.
The host star EPIC 206024342 is classified as a stellar host with an effective photospheric temperature of 5,724 K, a radius of 1.1 R☉, a mass of 0.928 M☉, an estimated bolometric luminosity of 1.165 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.22 dex (metal-poor relative to the Sun). From Earth, EPIC 206024342 shines at apparent V-band magnitude 13.096 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere. The EPIC 206024342 system is a multi-planet architecture hosting 3 confirmed worlds, with EPIC 206024342 d sharing its stellar neighborhood alongside EPIC 206024342 c, EPIC 206024342 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 206024342 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,724 K |
| Stellar Radius | 1.1000 R☉ |
| Stellar Mass | 0.9280 M☉ |
| Bolometric Luminosity | 1.165 L☉ |
| Metallicity [Fe/H] | -0.220 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 13.096 · G: 12.968 |
| System Architecture | 1 Star, 3 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 14.648 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 90.0000° |
| Mean Bulk Density | 2.28 g/cm³ (18.7 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1206.400 LY (369.888 pc) |