Basic Statistics for the Earth and Moon

Moon

 Mass .............................. 1.62E+23 lbm (7.35E+22 kg) Mass .............................. 0.012298 Earth  Equatorial radius .................5,700,131 ft (1,737.40 km) Equatorial radius .................. 0.27241 Earth  Mean density .........................208.51 lbm/ft^3 (3.34 gm/cm^3) Mean distance from Earth ............238,855 mi (384,400 km) Rotational period ................. 27.32166 days  Orbital period .................... 27.32166 days  Average length of lunar day ....... 29.53059 days  Mean orbital velocity .................3,379 ft/sec (1.03 km/sec) Orbital eccentricity .................0.0549  Tilt of axis .........................1.5424 deg  Orbital inclination ................. 5.1454 deg  Equatorial surface gravity ............5.315 ft/sec^2 (1.62 m/sec^2) Equatorial escape velocity ............7,808 ft/sec (2.38 km/sec) Visual geometric albedo ............... 0.12  Magnitude (Vo) ...................... -12.74  Mean surface temperature .............. -9.4 °F (-23°C) Mean surface temperature (day) ....... 224.6 °F (107°C) Mean surface temperature (night) .....-243.4 °F (-153°C) Maximum surface temperature .......... 253.4 °F (123°C) Minimum surface temperature ..........-387.4 °F (-233°C)

Earth

 Mass .............................. 1.32E+25 lbm (5.98E+24 kg) Mass ..................................... 1 Earth  Equatorial radius .................2.093E+07 ft (6.378E+03 km) Equatorial radius .........................1 Earth  Mean density .........................344.29 lbm/ft^3 (5.515 gm/cm^3) Mean distance from the Sun .......92,957,130 mi (149,600,000 km) Mean distance from the Sun ............... 1  Rotational period .................. 0.99727 days  Rotational period .................. 23.9345 hours  Orbital period ......................365.256 days  Mean orbital velocity ............... 97,736 ft/sec (29.79 km/sec) Orbital eccentricity .................0.0167  Tilt of axis ......................... 23.45 deg  Orbital inclination ...................... 0 deg  Equatorial escape velocity .......... 36,680 ft/sec (11.18 km/sec) Equatorial surface gravity .......... 32.174 ft/sec^2 (9.78 m/sec^2) Visual geometric albedo ............... 0.37  Mean surface temperature .................59 °F (15°C) Atmospheric pressure .................. 14.7 lb/in^2 (1.013 bar) Atmosphere    Nitrogen ............................ 77%     Oxygen .............................. 21%     Other gasses ......................... 2%