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A photograph of Jool taken from the Grestian LF-2000 mothership Destiny en-route to the system for the first time, December 25th, 2053. The shadow of Vall can be seen transitting the gas giant.
Orbital Parameters
Apoapsis 72,212,238,000m
Periapsis 65,334,882,000m
Semi-major axis 68,773,560,000m
Orbital eccentricity 0.05
Orbital period (sidereal) 4845.436667 days
Average orbital speed 4.134km/s
Mean anomaly 5.723°
Inclination 1.304°
Satellites 5 natural permanent satellites; Laythe, Vall, Tylo, Bop, and Pol, hundreds of smaller objects
Physical Characteristics
Equatorial radius 6,000,000m
Circumference 37,699,112m
Surface area 4.5238934×1014m2
Mass 4.233213×1024kg
Mean density 4678.7273 kg/m3
Surface gravity 7.85m/s<sup2 (0.8g)
Escape velocity 9.704km/s
Sidereal rotation period 21,549.425s (5h,59m,9.4s)
Solar day 21,600s (6h,0m,0s)
Axial tilt
Surface atmospheric pressure 200-600kPa (2-6 atm)
Sphere of influence 2.4559852x109m
Discovered Prehistoric times

Jool is the sixth and largest planet orbiting Kerbol. It is the only gas giant in the Kerbol System.