Mercury

Mercury. First Messenger flyby
Distance from Sun
0.39 au
Orbital period
0.241 years
Mass
1023×3.3011
Diameter
4 879.4 km
Mean density
5.427 g/cm3
Surface gravity
3.70 m/s2
Escape velocity
4 250 m/s
Rotation period
4 507.50 hours
Messenger. 29 September 2009