Moonstats - Lunar Vital Statistics

• Mean Distance of Moon from Earth - 238,712 mi (384,400 km)
• Greatest Distance of Moon from Earth (Apogee) - 252,586 mi (406,740 km) Shortest Distance of Moon from Earth (Perigee) - 221,331 mi (356,410 km)
• Circumference - 6,790 mi. (10,930 km.) 0.27 of Earth's circumference
• Diameter - 2,160 mi. (3,476 km.) 0.27 of Earth's diameter
• Mean Radius - 1,079 mi. (1,737.5 km.)
• Equatorial Radius - 1,079 mi. (1,738 km.)
• Polar Radius - 1,077 mi. (1,735 km.)
• Mean Angular Diameter - 31' 07"
• Mass - 8 x 10 (19) tons (7.35 x 10 (22) kg)
• Mass Ratio (Earth Moon) - 81.301
• Volume - 2.4 x 10(9) mi³ (2.197 x 10(10)km³
• Mean Density - 208 lb/ft³ (3.34 g/cm³) 0.6 Earth's density
• Gravity at Surface - 5.31 ft/s² (1.62 m/s²) 1/6 Earth's gravity
• Escape Velocity - 1.48 miles/sec (2.38 km/sec)
• Mean Inclination to Lunar Equator - 6° 41'
• Mean Orbital Inclination to Ecliptic - 5° 08' 43"
• Oscillation of Orbital Inclination to Equator - +/- 0° 9' every 173 days
• Inclination of Lunar Equator to Ecliptic - 1° 32' 33"
• Period of Revolution of Perigee - 3,232 days
• Orbital Direction - east (counterclockwise)
• Mean Orbital Speed - 2,287 mi/h (3,683 km/h) 33 minutes arc/hour
• Daily Sidereal Motion - 13.176358°
• Mean Centripetal Acceleration - 0.0003 g
• Mean Eccentricity of Orbit - 0.0549
• Synodic Month - 29.53059 days (29 days, 12 hr. 44 min, 2.8 sec.)
• Sidereal Month (star to star) - 27 days, 7hr. 43min, 11.5sec.
• Anomalistic Month (Apogee to Apogee) - 27 days, 13hr. 18Min, 33.2sec.
• Nodical Month, Draconic Month (Node to Node) - 27 days, 5hr. 5min. 35.8sec
• Regression of Nodes - 6,798 days (18.625 years) (19.538 ° per year)
• Rotational Period - 27 days, 7hr, 43min. 11.5sec
• Surface Temperature - day = 273 F (120 C) night = -244F (-153 C)
• Surface Area - 14,657,449 mi sq. (37,958,621 km sq.) 9.4 billion acres
• Visible Surface - 41% during lunar cycle, additional 18% from librations
• Parallax - 0.9507 °
• Moon's Angular Diameter - 0.5181 °
• Magnitude of Full Moon - -12.5
• Average Albedo - 0.07
• Estimated Age - 4.6 billion years
• Flight Time from Earth - 60 to 70 hours
• Increase in Mean Distance from Earth - 1.5 inches per year (3.8 cm per year)

Constellations

The Solar System