DE CVn b

Astrophysical Synthesis & Habitability Characterization

DE CVn b is a confirmed gas giant exoplanet orbiting the star DE CVn, located approximately 99.6 light-years (30.52 parsecs) from the Solar System. First announced in 2018 by Multiple Facilities using the Eclipse Timing Variations detection technique, this world measures 12.4 Earth radii (1.11 Jupiter radii) and has a measured mass of 3823.273 Earth masses (12.03 Jupiter masses). Combining its mass and radius yields a mean bulk density of 11.06 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 24.87 g⊕ (243.89 m/s²), and an escape velocity of 196.4 km/s.

In its orbital architecture around DE CVn, DE CVn b completes one full revolution every 4098.1 Earth days (11.22Julian years) at a semi-major axis of 5.75 AU (a wide outer-system orbit beyond Jupiter's 5.20 AU distance in our Solar System). Its mean orbital velocity is approximately 15.3 km/s (compared to Earth's 29.8 km/s). The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.

❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 47 K (-226°C / -375°F) and an incident flux of 0.00 S⊕ (~1 W/m²), surface water and volatile species on DE CVn b would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.

The host star DE CVn is classified as a stellar host with an effective photospheric temperature of 3,579 K, a radius of 0.4248 R☉, a mass of 0.51 M☉, an estimated bolometric luminosity of 0.027 L☉. From Earth, DE CVn shines at apparent V-band magnitude 12.956 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

Discovery Facility: Multiple Facilities · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).