Merkurius

Mean Distance from the Sun (AU) 0.3871
Sidereal period of orbit (years) 0.24
Mean Orbital Velocity (km/sec) 47.89
Orbital Eccentricity 0.206
Inclination to ecliptic (degrees) 7.00
Equatorial Radius (km) 2439
Polar Radius (km) same
Mass of planet (Earth=1) 0.06
Mean density (grams/centimeter³ ) 5.43
Body rotation period (hours) 1408
Tilt of equator to orbit (degrees) 2
Number of observed satellites 0