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Lunar Statistics, Parameters and Other Technical Data |
Technical Facts... | ||
Mass (10^{24} kg) | 0.07349 | |
Volume (10^{10} km^{3}) | 2.1968 | |
Equatorial radius (km) | 1737.4 | |
Polar radius (km) | 1737.4 | |
Volumetric mean radius (km) | 1737.4 | |
Ellipticity (Flattening) | 0.000 | |
Mean density (kg/m^{3}) | 3340 | |
Surface gravity (m/s^{2}) | 1.62 | |
Escape velocity (km/s) | 2.38 | |
GM (x 10^{6} km^{3}/s^{2}) | 0.0049 | |
Bond albedo | 0.11 | |
Visual geometric albedo | 0.12 | |
Visual magnitude V(1,0) | +0.21 | |
Solar irradiance (W/m^{2}) | 1367.6 | |
Black-body temperature (K) | 274.5 | |
Topographic range (km) | 16 | |
Moment of inertia (I/MR^{2}) | 0.394 | |
J_{2} (x 10^{-6}) | 202.7 |
Moon Semimajor axis (10^{6} km) 0.3844 Perigee (10^{6} km) 0.3633 Apogee (10^{6} km) 0.4055 Revolution period (days) 27.3217 Synodic period (days) 29.53 Mean orbital velocity (km/s) 1.023 Max. orbital velocity (km/s) 1.076 Min. orbital velocity (km/s) 0.964 Orbit inclination (deg) 5.145 Orbit eccentricity 0.0549 Sidereal rotation period (hrs) 655.728 Equatorial inclination (deg) 6.68 Recession rate from Earth (cm/yr) 3.8 Mean values at opposition from Earth Distance from Earth (km) 384,467 Apparent diameter (seconds of arc) 1864.2 Apparent visual magnitude -12.74(Back To Top)
Diurnal temperature range: >100 K to <400 K (roughly -250 F to +250 F) Total mass of atmosphere: ~25,000 kg Surface pressure (night): 3 x 10^{-15} bar (2 x 10^{-12} torr) Abundance at surface: 2 x 10^{5} particles/cm^{3} Estimated Composition (particles per cubic cm): Helium 4 (^{4}He) - 40,000 ; Neon 20 (^{20}Ne) - 40,000 ; Hydrogen (H_{2}) - 35,000 Argon 40 (^{40}Ar) - 30,000 ; Neon 22 (^{22}Ne) - 5,000 ; Argon 36 (^{36}Ar) - 2,000 Methane - 1000 ; Ammonia - 1000 ; Carbon Dioxide (CO_{2}) - 1000 Trace Oxygen (O^{+}), Aluminum (Al^{+}), Silicon (Si^{+}) Possible Phosphorus (P^{+}), Sodium (Na^{+}), Magnesium (Mg^{+}) Composition of the tenuous lunar atmosphere is poorly known and variable, these are estimates of the upper limits of the nighttime ambient atmosphere composition. Daytime levels were difficult to measure due to heating and outgassing of Apollo surface experiments.(Back To Top)
MEAN DISTANCE OF THE 238,712 miles (384,400 km) MOON FROM EARTH 60.27 Earth radii 0.002 570 a.u. GREATEST DISTANCE OF THE 252,586 miles (406,740 km) MOON FROM EA(APOGEE) SHORTEST DISTANCE OF THE 221,331 miles (356,410 km) MOON FROM EARTH(PERIGEE) CIRCUMFERENCE 6,790 miles (10,930 km) 0.27 of Earths circumference DIAMETER 2,160 miles (3,476 km) 0.27 of Earth's diameter MEAN RADIUS 1,079 miles (1,737.5 km) EQUATORIAL RADIUS 1,079 miles (1,738 km) POLAR RADIUS 1,077 miles (1,735 km) MEAN ANGULAR DIAMETER 31'07"MASS 8 x 10^{19} tons (7.35 x 10^{22} kg) 0.0123 Earth's volume
MASS RATIO (EARTH/MOON) 81.301VOLUME 2.4 x 10^{3} miles^{3} (2.197 x 10^{10} km^{3}) 0.0203 Earth's volume
MEAN DENSITY 208 lb/ft^{3} (3.34 g/cm^{3}) 3.33 more dense than water 0.6 Earth's density
GRAVITY AT THE SURFACE 5.31 ft/sec^{2} (1.62 m/s^{2}) .1667 g (1/6 Earth's gravity)
ESCAPE VELOCITY 1.48 miles/sec (2.38 km/sec) MEAN INCLINATION TO LUNAR 60 41' EQUATOR MEAN ORBITAL INCLINATION 50 08'43" TO ECLIPTIC OSCILLATION OF ORBITAL 00 9' every 173 days INCLINATION TO EQUATOR INCLINATION OF LUNAR 10 32'33" EQUATOR TO ECLIPTIC PERIOD OF REVOLUTION 3,232 days OF PERIGEE ORBITAL DIRECTION East (counterclockwise) MEAN ORBITAL SPEED 2,287 miles/hour (3,683 km/hr) 33 minutes arc/hour DAILY SIDEREAL MOTION 13.176358 degreesMEAN CENTRIPETAL 0.01 ft/s^{2} (0.00272 M/s^{2} 0.0003 g
MEAN ECCENTRICITY 0.0549 (mean eccentricity of OF ORBIT Earths orbit is 0.0167) SYNODIC MONTH 29.53059 days (NEW MOON TO NEW MOON) 29 days, 12 hr, 44 min, 2.8 sec SIDEREAL MONTH 27.32166 days (Star To Star) 27 days, 7 hr, 43 min, 11.5 sec ANOMALISTIC MONTH 27.55455 days (APOGEE TO APOGEE OR 27 days, 13 hr, 18 min, 33.2 sec PERIGEE TO PERIGEE) NODICAL MONTH, 27.21222 days DRACONIC MONTH 27 days, 5 hr, 5 min, 35.8 sec (NODE TO NODE) TROPICAL MONTH 27.321582 days (1st POINT Of ARIES TO 7 days, 7 hr, 43 min, 4.7 sec TO FIRST POINT OF ARIES) REGRESSION OF NODES 6,798 days 18.6247 years (19.538 degrees per year) ROTATION PERIOD 27.321661 days 27 days, 7 hr, 43 min, 11.5 sec SURFACE TEMPERATURE 273' F (1200 C) day 244' F (-153' C) nightSURFACE AREA 14,657,449 miles^{2} (37,958,621 km^{2}) 9.4 Billion acres - 26% Larger Than Africa
VISIBLE SURFACE 41 percent during one lunar cycle 18 percent additional surface visible due to librations 59 percent total visible surface PARALLAX 0.9507 degrees MOON'S ANGULAR DIAMETER 0.5181 degrees MAGNITUDE OF FULL MOON -12.5 AVERAGE ALBEDO 0.07 ESTIMATED AGE OF MOON 4.6 billion years FLIGHT TIME FROM EARTH 60 to 70 hours INCREASE IN MEAN 1.5 inches/year (3.8 cm/year) DISTANCE FROM EARTH(Back To Top)