Average Distance from the Sun

Metric: 227,936,640 km

English: 141,633,260 miles

Perihelion (closest)

Metric: 206,600,000 km

English: 128,400,000 miles

Aphelion (farthest)

Metric: 249,200,000 km

English: 154,900,000 miles

Equatorial Radius

Metric: 3,397 km

English: 2,111 miles

Equatorial Circumference

Metric: 21,344 km

English: 13,263 miles

Volume

Metric: 163,140,000,000 km3

Mass

Metric: 641,850,000,000,000,000,000,000 kg

Density

Metric: 3.94 g/cm3

Surface Area

Metric: 144,100,000 km2

English: 89,500,000 square miles

Equatorial Surface Gravity

Metric: 3.693 m/s2

English: 12.116 ft/s2

Escape Velocity

Metric: 18,072 km/h

English: 11,229 mph

Sidereal Rotation Period (Length of Day)

1.026 Earth days

24.62 hours

Sidereal Orbit Period (Length of Year)

1.8807 Earth years

686.93 Earth days

Mean Orbit Velocity

Metric: 86,871 km/h

English: 53,979 mph

Orbital Eccentricity

.0934

Orbital Inclination to Ecliptic

1.8 degrees

Equatorial Inclination to Orbit

25.19

Orbital Circumference

Metric: 1.366,900,000 km

English: 849,400,000 miles

Minimum/Maximum Surface Temperature

Metric: -87 to -5 °C

English: -125 to 23 °F

Atmospheric Constituents

Carbon Dioxide 95.32%

Nitrogen 2.7%

Argon 1.6%

Oxygen 0.13%

Other 0.25%

Moons

1. Phobos

2. Deimos