Mercury



Average distance from the Sun 0.387 AU (5.79 x 107 km)
Eccentricity of orbit 0.2056
Maximum distance from the Sun 0.467 AU (6.97 x 107 km)
Minimum distance from the Sun 0.306 AU (4.59 x 107 km)
Inclination of orbit to ecliptic 7 0' 16''
Average orbital velocity 47.9 km/sec
Orbital period 0.24085 y (87.969 days)
Period of rotation 58.646 days
Inclination of equator to orbit 0
Equatorial diameter 4878 km
Mass 3.31 x 1023 kg
Average density 5440 kg/m3 (5400 kg/m3 uncompressed)
Surface gravity 0.38 earth gravity
Escape velocity 4.3 km/sec
Surface temperature 100 K to 700 K (-280 F to 800 F)
Average albedo 0.06
Oblateness 0