orbit: 227,940,000 km (1.52 AU) from Sun
period: 686.98 days
Inclination: 1.85
Eccentricity: 0.09
diameter: 6,794 km
mass: 6.4219e23 kg
4th order from sun

Sources:
www.nineplanets.org
www.nasa.gov

Satellites:
Phobos, 9km from surface, 22km wide, 1.08e16kg, discovered in 1877 by Asaph Hall
Deimos, 23km from surface, 12km wide, 1.80e15kg, discovered in 1877 by Asaph Hall