GJ 9714 b

Astrophysical Synthesis & Habitability Characterization

GJ 9714 b is a confirmed gas giant exoplanet orbiting the star GJ 9714, located approximately 66.9 light-years (20.51 parsecs) from the Solar System. First announced in 2022 by Multiple Observatories using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 12.5 Earth radii (1.12 Jupiter radii) and has a measured mass of 2988.541 Earth masses (9.4 Jupiter masses). Combining its mass and radius yields a mean bulk density of 8.44 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 19.13 g⊕ (187.6 m/s²), and an escape velocity of 173 km/s.

In its orbital architecture around GJ 9714, GJ 9714 b completes one full revolution every 19240.755 Earth days (52.68Julian years) at a semi-major axis of 12.319 AU (a wide outer-system orbit beyond Jupiter's 5.20 AU distance in our Solar System). Its mean orbital velocity is approximately 7 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.155 carries the world between 10.4096 AU at periapsis and 14.2284 AU at apoapsis, driving measurable seasonal insolation cycles.

❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 48 K (-225°C / -373°F) and an incident flux of 0.00 S⊕ (~1 W/m²), surface water and volatile species on GJ 9714 b would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.

The host star GJ 9714 is classified as an orange K-type star of spectral type K5V with an effective photospheric temperature of 4,263 K, a radius of 0.6627 R☉, a mass of 0.67 M☉, an estimated bolometric luminosity of 0.13 L☉. From Earth, GJ 9714 shines at apparent V-band magnitude 9.37 (accessible to binoculars and small amateur telescopes) in the Southern celestial hemisphere.

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