NSVS 14256825 b

Astrophysical Synthesis & Habitability Characterization

NSVS 14256825 b is a confirmed gas giant exoplanet orbiting the star NSVS 14256825, located approximately 2677.3 light-years (820.88 parsecs) from the Solar System. First announced in 2019 by Multiple Observatories using the Eclipse Timing Variations detection technique, this world measures 12.3 Earth radii (1.1 Jupiter radii) and has a measured mass of 4497.295 Earth masses (14.15 Jupiter masses). Combining its mass and radius yields a mean bulk density of 13.33 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 29.73 g⊕ (291.55 m/s²), and an escape velocity of 213.9 km/s.

In its orbital architecture around NSVS 14256825, NSVS 14256825 b completes one full revolution every 3225 Earth days (8.83Julian years) at a semi-major axis of 3.12 AU (corresponding to the middle-system regime between Mars at 1.52 AU and Jupiter at 5.20 AU). Its mean orbital velocity is approximately 10.5 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.12 carries the world between 2.7456 AU at periapsis and 3.4944 AU at apoapsis, driving measurable seasonal insolation cycles.

⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 473 K (+200°C / +392°F) and receiving 9.67 S⊕ (~13,158 W/m²), NSVS 14256825 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star NSVS 14256825 is classified as a stellar host with an effective photospheric temperature of 40,000 K, a radius of 0.188 R☉, a mass of 0.419 M☉, an estimated bolometric luminosity of 81.179 L☉. From Earth, NSVS 14256825 shines at apparent V-band magnitude 13.296 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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