EPIC 212587672 c
Astrophysical Synthesis & Habitability Characterization
EPIC 212587672 c is a confirmed sub-neptune exoplanet orbiting the star EPIC 212587672, located approximately 1043.9 light-years (320.07 parsecs) from the Solar System. First announced in 2021 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0471% across the stellar disk), this world measures 2.32 Earth radii and has a measured mass of 5.99 Earth masses. Combining its mass and radius yields a mean bulk density of 2.65 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.11 g⊕ (10.89 m/s²), and an escape velocity of 18 km/s.
In its orbital architecture around EPIC 212587672, EPIC 212587672 c completes one full revolution every 23.229 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 658 K (+385°C / +725°F), EPIC 212587672 c orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star EPIC 212587672 is classified as a stellar host with an effective photospheric temperature of 6,004 K, a radius of 0.98 R☉, a mass of 0.99 M☉, an estimated bolometric luminosity of 1.12 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.18 dex (metal-poor relative to the Sun). From Earth, EPIC 212587672 shines at apparent V-band magnitude 12.488 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere. The EPIC 212587672 system is a multi-planet architecture hosting 2 confirmed worlds, with EPIC 212587672 c sharing its stellar neighborhood alongside EPIC 212587672 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 212587672 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,004 K |
| Stellar Radius | 0.9800 R☉ |
| Stellar Mass | 0.9900 M☉ |
| Bolometric Luminosity | 1.12 L☉ |
| Metallicity [Fe/H] | -0.180 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 12.488 · G: 12.204 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 23.229 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 89.4212° |
| Mean Bulk Density | 2.65 g/cm³ (18 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1043.900 LY (320.070 pc) |