Mercury
•MEAN RADIUS: 2439.7 km
•MASS: 0.055 (Earth=1)
•DENSITY: 5.43 (g/cm^3)
•GRAVITY: 0.376 (Earth=1)
•ORBIT PERIOD: 87.97 (Earth days)
•ROTATION PERIOD: 58.65 (Earth days)
•SEMIMAJOR AXIS OF ORBIT: 0.387 au
•ECCENTRICITY OF ORBIT: 0.206
