Mercury

SI Units
Earth Relative
Radius (Equatorial)
2,439,700 m
0.3829 x Earth
Mass
3.3022 x 1023 kg
0.55 x Earth
Temperature (Surface Mean)
452 K (179°C)
Gravity
3.7 ms-2
0.378 g
Escape Velocity
4,250 ms-1
Axis Tilt
Distance from Sun (Semi-Major)
5.79091 x 1010 m
0.387098 AU
Orbital Period
0.2409 Earth Years (87.969 Earth Days)
Rotational Period
58.65 Earth Days
Number of Moons
-
Atmosphere
Little, traces of Hydrogen and Helium
Rings
-
Missions to Mercury
Mariner 10, Messenger

SI Units
Earth Relative
Radius (Equatorial)
2,439,700 m
0.3829 x Earth
Mass
3.3022 x 1023 kg
0.55 x Earth
Temperature (Surface Mean)
452 K (179°C)
Gravity
3.7 ms-2
0.378 g
Escape Velocity
4,250 ms-1
Axis Tilt
Distance from Sun (Semi-Major)
5.79091 x 1010 m
0.387098 AU
Orbital Period
0.2409 Earth Years (87.969 Earth Days)
Rotational Period
58.65 Earth Days
Number of Moons
-
Atmosphere
Little, traces of Hydrogen and Helium
Rings
-
Missions to Mercury
Mariner 10, Messenger

Nasa Factsheet. Wikipedia Info