<Table> Moon <Tr> <Td_colspan="2"> Full moon as seen from North America in Earth's Northern Hemisphere </Td> </Tr> <Tr> <Th_colspan="2"> Designations </Th> </Tr> <Tr> <Th> Adjectives </Th> <Td> <Ul> <Li> Lunar </Li> <Li> selenic </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Orbital characteristics </Th> </Tr> <Tr> <Td_colspan="2"> Epoch J2000 </Td> </Tr> <Tr> <Th> Perigee </Th> <Td> 362 600 km (356 400--370 400 km) </Td> </Tr> <Tr> <Th> Apogee </Th> <Td> 405 400 km (404 000--406 700 km) </Td> </Tr> <Tr> <Th> Semi-major axis </Th> <Td> 7008384399000000000 ♠ 384 399 km (7008384466527698999 ♠ 0.002 57 AU) </Td> </Tr> <Tr> <Th> Eccentricity </Th> <Td> 6998549000000000000 ♠ 0.0549 </Td> </Tr> <Tr> <Th> Orbital period </Th> <Td> 7006236059151040000 ♠ 27.321 661 d (27 d 7 h 43 min 11.5 s) </Td> </Tr> <Tr> <Th> Synodic period </Th> <Td> 7006255144288960000 ♠ 29.530 589 d (29 d 12 h 44 min 2.9 s) </Td> </Tr> <Tr> <Th> Average orbital speed </Th> <Td> 7003102200000000000 ♠ 1.022 km / s </Td> </Tr> <Tr> <Th> Inclination </Th> <Td> 5.145 ° to the ecliptic </Td> </Tr> <Tr> <Th> Longitude of ascending node </Th> <Td> Regressing by one revolution in 18.61 years </Td> </Tr> <Tr> <Th> Argument of perigee </Th> <Td> Progressing by one revolution in 8.85 years </Td> </Tr> <Tr> <Th> Satellite of </Th> <Td> Earth </Td> </Tr> <Tr> <Th_colspan="2"> Physical characteristics </Th> </Tr> <Tr> <Th> Mean radius </Th> <Td> 7006173710000000000 ♠ 1737. 1 km (0.273 of Earth's) </Td> </Tr> <Tr> <Th> Equatorial radius </Th> <Td> 7006173810000000000 ♠ 1738. 1 km (0.273 of Earth's) </Td> </Tr> <Tr> <Th> Polar radius </Th> <Td> 7006173600000000000 ♠ 1736. 0 km (0.273 of Earth's) </Td> </Tr> <Tr> <Th> Flattening </Th> <Td> 6997119999999999999 ♠ 0.0012 </Td> </Tr> <Tr> <Th> Circumference </Th> <Td> 7007109210000000000 ♠ 10 921 km (equatorial) </Td> </Tr> <Tr> <Th> Surface area </Th> <Td> 7013379300000000000 ♠ 3.793 × 10 km (0.074 of Earth's) </Td> </Tr> <Tr> <Th> Volume </Th> <Td> 7019219580000000000 ♠ 2.1958 × 10 km (0.020 of Earth's) </Td> </Tr> <Tr> <Th> Mass </Th> <Td> 7022734200000000000 ♠ 7.342 × 10 kg (6998123000000000000 ♠ 0.012 300 of Earth's) </Td> </Tr> <Tr> <Th> Mean density </Th> <Td> 7003334400000000000 ♠ 3.344 g / cm 6999606000000000000 ♠ 0.606 × Earth </Td> </Tr> <Tr> <Th> Surface gravity </Th> <Td> 7000162000000000000 ♠ 1.62 m / s (6999165400000000000 ♠ 0.1654 g) </Td> </Tr> <Tr> <Th> Moment of inertia factor </Th> <Td> 6999392900000000000 ♠ 0.3929 ± 0.0009 </Td> </Tr> <Tr> <Th> Escape velocity </Th> <Td> 7003238000000000000 ♠ 2.38 km / s </Td> </Tr> <Tr> <Th> Sidereal rotation period </Th> <Td> 7006236059151040000 ♠ 27.321 661 d (synchronous) </Td> </Tr> <Tr> <Th> Equatorial rotation velocity </Th> <Td> 4.627 m / s </Td> </Tr> <Tr> <Th> Axial tilt </Th> <Td> <Ul> <Li> 1.5424 ° to ecliptic </Li> <Li> 6.687 ° to orbit plane </Li> <Li> 24 ° to Earth's equator </Li> </Ul> </Td> </Tr> <Tr> <Th> North pole right ascension </Th> <Td> <Ul> <Li> 17 47 26 </Li> <Li> 266.86 ° </Li> </Ul> </Td> </Tr> <Tr> <Th> North pole declination </Th> <Td> 65.64 ° </Td> </Tr> <Tr> <Th> Albedo </Th> <Td> 0.136 </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Th> Surface temp . </Th> <Th> min </Th> <Th> mean </Th> <Th> max </Th> </Tr> <Tr> <Th> Equator </Th> <Td> 100 K </Td> <Td> 220 K </Td> <Td> 390 K </Td> </Tr> <Tr> <Th> 85 ° N </Th> <Td> </Td> <Td> 150 K </Td> <Td> 230 K </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th> Apparent magnitude </Th> <Td> <Ul> <Li> − 2.5 to − 12.9 </Li> <Li> − 12.74 (mean full moon) </Li> </Ul> </Td> </Tr> <Tr> <Th> Angular diameter </Th> <Td> 29.3 to 34.1 arcminutes </Td> </Tr> <Tr> <Th_colspan="2"> Atmosphere </Th> </Tr> <Tr> <Th> Surface pressure </Th> <Td> <Ul> <Li> 10 Pa (1 picobar) (day) </Li> <Li> 10 Pa (1 femtobar) (night) </Li> </Ul> </Td> </Tr> <Tr> <Th> Composition by volume </Th> <Td> <Ul> <Li> He </Li> <Li> Ar </Li> <Li> Ne </Li> <Li> Na </Li> <Li> </Li> <Li> </Li> <Li> Rn </Li> </Ul> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Full moon as seen from North America in Earth's Northern Hemisphere </Td> </Tr>

How long is the revolution of the moon