Neptune

Mean Distance from the Sun (AU) 30.06
Sidereal period of orbit (years) 164.79
Mean Orbital Velocity (km/sec) 5.43
Orbital Eccentricity 0.010
Inclination to ecliptic (degrees) 1.77
Equatorial Radius (km) 25269
Polar Radius (km) 24340
Mass of planet (Earth=1) 17.14
Mean density (grams/centimeter³ ) 1.64
Body rotation period (hours) 16.11
Tilt of equator to orbit (degrees) 29.6
Number of observed satellites 8