Mercury Data


Average Distance from the Sun

Metric: 57,909,175 km

English: 35,983,095 miles


Perihelion (closest)

Metric: 46,000,000 km

English: 28,580,000 miles


Aphelion (farthest)

Metric: 69,820,000 km

English: 43,380,000 miles


Equatorial Radius

Metric: 2,439.7 km

English: 1,516.0 miles


Equatorial Circumference

Metric: 15,329.1 km


Volume

Metric: 60,827,200,000 km3

English: 14,593,200,000 mi3


Mass

Metric: 330,220,000,000,000,

000,000,000 kg


Density

Metric: 5.427 g/cm3


Surface Area

Metric: 74,800,000 km2

English: 28,900,000

square miles


Equatorial Surface Gravity

Metric: 3.7 m/s2

English: 12.1 ft/s2


Escape Velocity

Metric: 15,300 km/h

English: 9,500 mph


Sidereal Rotation Period (Length of Day)

58.646 Earth days

1407.5 hours


Sidereal Orbit Period (Length of Year)

0.241 Earth years

87.97 Earth days


Mean Orbit Velocity

Metric: 172,341 km/h

English: 107,088 mph


Orbital Eccentricity

0.20563069


Orbital Inclination to Ecliptic

7 degrees


Equatorial Inclination to Orbit

0 degrees


Orbital Circumference

Metric: 356,000,000 km

English: 221,000,000 miles


Minimum/Maximum Surface Temperature

Metric: -173/427 °C

English: -279/801 °F


Atmospheric Constituents

Helium42%

Sodium42%

Oxygen 15%

Other 1%