<Table> Earth <Tr> <Td colspan="2"> The Blue Marble photograph of Earth , taken during the Apollo 17 lunar mission in 1972 </Td> </Tr> <Tr> <Th colspan="2"> Orbital characteristics </Th> </Tr> <Tr> <Td colspan="2"> Epoch J2000 </Td> </Tr> <Tr> <Th> Aphelion </Th> <Td> 152 100 000 km ( 94 500 000 mi ; 1.017 AU ) </Td> </Tr> <Tr> <Th> Perihelion </Th> <Td> 147 095 000 km ( 91 401 000 mi ; 0.983 27 AU ) </Td> </Tr> <Tr> <Th> Semi-major axis </Th> <Td> 149 598 023 km ( 92 955 902 mi ; 1.000 001 02 AU ) </Td> </Tr> <Tr> <Th> Eccentricity </Th> <Td> 6998167086000000000 ♠ 0.016 7086 </Td> </Tr> <Tr> <Th> Orbital period </Th> <Td> 365.256 363 004 d ( 1.000 017 420 96 yr ) </Td> </Tr> <Tr> <Th> Average orbital speed </Th> <Td> 29.78 km / s ( 107 200 km / h ; 66 600 mph ) </Td> </Tr> <Tr> <Th> Mean anomaly </Th> <Td> 7000625904740362451 ♠ 358.617 ° </Td> </Tr> <Tr> <Th> Inclination </Th> <Td> <Ul> <Li> 6999124878307980194 ♠ 7.155 ° to the Sun 's equator ; </Li> <Li> 6998275533383683093 ♠ 1.578 69 ° to invariable plane ; </Li> <Li> 6993872664625997166 ♠ 0.000 05 ° to J2000 ecliptic </Li> </Ul> </Td> </Tr> <Tr> <Th> Longitude of ascending node </Th> <Td> 3000803464756118225 ♠ − 11.260 64 ° to J2000 ecliptic </Td> </Tr> <Tr> <Th> Argument of perihelion </Th> <Td> 7000199330266505796 ♠ 114.207 83 ° </Td> </Tr> <Tr> <Th> Satellites </Th> <Td> <Ul> <Li> 1 natural satellite : the Moon </Li> <Li> 5 quasi-satellites </Li> <Li> > 1 400 operational artificial satellites </Li> <Li> > 16 000 space debris </Li> </Ul> </Td> </Tr> <Tr> <Th colspan="2"> Physical characteristics </Th> </Tr> <Tr> <Th> Mean radius </Th> <Td> 6371.0 km ( 3958.8 mi ) </Td> </Tr> <Tr> <Th> Equatorial radius </Th> <Td> 6378.1 km ( 3963.2 mi ) </Td> </Tr> <Tr> <Th> Polar radius </Th> <Td> 6356.8 km ( 3949.9 mi ) </Td> </Tr> <Tr> <Th> Flattening </Th> <Td> 6997335280000000000 ♠ 0.003 3528 1 / 7002298257222101000 ♠ 298.257 222 101 ( ETRS89 ) </Td> </Tr> <Tr> <Th> Circumference </Th> <Td> <Ul> <Li> 40 075.017 km equatorial ( 24 901.461 mi ) </Li> <Li> 40 007.86 km meridional ( 24 859.73 mi ) </Li> </Ul> </Td> </Tr> <Tr> <Th> Surface area </Th> <Td> <Ul> <Li> 510 072 000 km ( 196 940 000 sq mi ) </Li> <Li> 148 940 000 km land ( 57 510 000 sq mi ; 29.2 % ) </Li> <Li> 361 132 000 km water ( 139 434 000 sq mi ; 70.8 % ) </Li> </Ul> </Td> </Tr> <Tr> <Th> Volume </Th> <Td> 7021108320999999999 ♠ 1.083 21 × 10 km ( 7011259876000000000 ♠ 2.598 76 × 10 cu mi ) </Td> </Tr> <Tr> <Th> Mass </Th> <Td> 7024597237000000000 ♠ 5.972 37 × 10 kg ( 7024597236001731600 ♠ 1.316 68 × 10 lb ) ( 7024596565000000000 ♠ 3.0 × 10 M ) </Td> </Tr> <Tr> <Th> Mean density </Th> <Td> 5.514 g / cm ( 0.1992 lb / cu in ) </Td> </Tr> <Tr> <Th> Surface gravity </Th> <Td> 9.807 m / s ( 7000100000000000000 ♠ 1 g ; 32.18 ft / s ) </Td> </Tr> <Tr> <Th> Moment of inertia factor </Th> <Td> 0.3307 </Td> </Tr> <Tr> <Th> Escape velocity </Th> <Td> 11.186 km / s ( 40 270 km / h ; 25 020 mph ) </Td> </Tr> <Tr> <Th> Sidereal rotation period </Th> <Td> 7004861641003520000 ♠ 0.997 269 68 d ( 23h 56m 4.100 s ) </Td> </Tr> <Tr> <Th> Equatorial rotation velocity </Th> <Td> 0.4651 km / s ( 1674.4 km / h ; 1040.4 mph ) </Td> </Tr> <Tr> <Th> Axial tilt </Th> <Td> 6999409092629495479 ♠ 23.439 2811 ° </Td> </Tr> <Tr> <Th> Albedo </Th> <Td> <Ul> <Li> 0.367 geometric </Li> <Li> 0.306 Bond </Li> </Ul> </Td> </Tr> <Tr> <Td colspan="2"> <Table> <Tr> <Th> Surface temp . </Th> <Th> min </Th> <Th> mean </Th> <Th> max </Th> </Tr> <Tr> <Th> Kelvin </Th> <Td> 184 K </Td> <Td> 288 K </Td> <Td> 330 K </Td> </Tr> <Tr> <Th> Celsius </Th> <Td> − 89.2 ° C </Td> <Td> 15 ° C </Td> <Td> 56.7 ° C </Td> </Tr> <Tr> <Th> Fahrenheit </Th> <Td> − 128.5 ° F </Td> <Td> 59 ° F ( 15 ° C ) </Td> <Td> 134 ° F ( 57 ° C ) </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th colspan="2"> Atmosphere </Th> </Tr> <Tr> <Th> Surface pressure </Th> <Td> 7005101325000000000 ♠ 101.325 kPa ( at MSL ) </Td> </Tr> <Tr> <Th> Composition by volume </Th> <Td> <Ul> <Li> 78.08 % nitrogen ( N ; dry air ) </Li> <Li> 20.95 % oxygen ( O ) </Li> <Li> 0.930 % argon </Li> <Li> 0.0402 % carbon dioxide </Li> <Li> ~ 1 % water vapor ( climate
<Table> Earth <Tr> <Td colspan="2"> The Blue Marble photograph of Earth , taken during the Apollo 17 lunar mission in 1972 </Td> </Tr> <Tr> <Th colspan="2"> Orbital characteristics </Th> </Tr> <Tr> <Td colspan="2"> Epoch J2000 </Td> </Tr> <Tr> <Th> Aphelion </Th> <Td> 152 100 000 km ( 94 500 000 mi ; 1.017 AU ) </Td> </Tr> <Tr> <Th> Perihelion </Th> <Td> 147 095 000 km ( 91 401 000 mi ; 0.983 27 AU ) </Td> </Tr> <Tr> <Th> Semi-major axis </Th> <Td> 149 598 023 km ( 92 955 902 mi ; 1.000 001 02 AU ) </Td> </Tr> <Tr> <Th> Eccentricity </Th> <Td> 6998167086000000000 ♠ 0.016 7086 </Td> </Tr> <Tr> <Th> Orbital period </Th> <Td> 365.256 363 004 d ( 1.000 017 420 96 yr ) </Td> </Tr> <Tr> <Th> Average orbital speed </Th> <Td> 29.78 km / s ( 107 200 km / h ; 66 600 mph ) </Td> </Tr> <Tr> <Th> Mean anomaly </Th> <Td> 7000625904740362451 ♠ 358.617 ° </Td> </Tr> <Tr> <Th> Inclination </Th> <Td> <Ul> <Li> 6999124878307980194 ♠ 7.155 ° to the Sun 's equator ; </Li> <Li> 6998275533383683093 ♠ 1.578 69 ° to invariable plane ; </Li> <Li> 6993872664625997166 ♠ 0.000 05 ° to J2000 ecliptic </Li> </Ul> </Td> </Tr> <Tr> <Th> Longitude of ascending node </Th> <Td> 3000803464756118225 ♠ − 11.260 64 ° to J2000 ecliptic </Td> </Tr> <Tr> <Th> Argument of perihelion </Th> <Td> 7000199330266505796 ♠ 114.207 83 ° </Td> </Tr> <Tr> <Th> Satellites </Th> <Td> <Ul> <Li> 1 natural satellite : the Moon </Li> <Li> 5 quasi-satellites </Li> <Li> > 1 400 operational artificial satellites </Li> <Li> > 16 000 space debris </Li> </Ul> </Td> </Tr> <Tr> <Th colspan="2"> Physical characteristics </Th> </Tr> <Tr> <Th> Mean radius </Th> <Td> 6371.0 km ( 3958.8 mi ) </Td> </Tr> <Tr> <Th> Equatorial radius </Th> <Td> 6378.1 km ( 3963.2 mi ) </Td> </Tr> <Tr> <Th> Polar radius </Th> <Td> 6356.8 km ( 3949.9 mi ) </Td> </Tr> <Tr> <Th> Flattening </Th> <Td> 6997335280000000000 ♠ 0.003 3528 1 / 7002298257222101000 ♠ 298.257 222 101 ( ETRS89 ) </Td> </Tr> <Tr> <Th> Circumference </Th> <Td> <Ul> <Li> 40 075.017 km equatorial ( 24 901.461 mi ) </Li> <Li> 40 007.86 km meridional ( 24 859.73 mi ) </Li> </Ul> </Td> </Tr> <Tr> <Th> Surface area </Th> <Td> <Ul> <Li> 510 072 000 km ( 196 940 000 sq mi ) </Li> <Li> 148 940 000 km land ( 57 510 000 sq mi ; 29.2 % ) </Li> <Li> 361 132 000 km water ( 139 434 000 sq mi ; 70.8 % ) </Li> </Ul> </Td> </Tr> <Tr> <Th> Volume </Th> <Td> 7021108320999999999 ♠ 1.083 21 × 10 km ( 7011259876000000000 ♠ 2.598 76 × 10 cu mi ) </Td> </Tr> <Tr> <Th> Mass </Th> <Td> 7024597237000000000 ♠ 5.972 37 × 10 kg ( 7024597236001731600 ♠ 1.316 68 × 10 lb ) ( 7024596565000000000 ♠ 3.0 × 10 M ) </Td> </Tr> <Tr> <Th> Mean density </Th> <Td> 5.514 g / cm ( 0.1992 lb / cu in ) </Td> </Tr> <Tr> <Th> Surface gravity </Th> <Td> 9.807 m / s ( 7000100000000000000 ♠ 1 g ; 32.18 ft / s ) </Td> </Tr> <Tr> <Th> Moment of inertia factor </Th> <Td> 0.3307 </Td> </Tr> <Tr> <Th> Escape velocity </Th> <Td> 11.186 km / s ( 40 270 km / h ; 25 020 mph ) </Td> </Tr> <Tr> <Th> Sidereal rotation period </Th> <Td> 7004861641003520000 ♠ 0.997 269 68 d ( 23h 56m 4.100 s ) </Td> </Tr> <Tr> <Th> Equatorial rotation velocity </Th> <Td> 0.4651 km / s ( 1674.4 km / h ; 1040.4 mph ) </Td> </Tr> <Tr> <Th> Axial tilt </Th> <Td> 6999409092629495479 ♠ 23.439 2811 ° </Td> </Tr> <Tr> <Th> Albedo </Th> <Td> <Ul> <Li> 0.367 geometric </Li> <Li> 0.306 Bond </Li> </Ul> </Td> </Tr> <Tr> <Td colspan="2"> <Table> <Tr> <Th> Surface temp . </Th> <Th> min </Th> <Th> mean </Th> <Th> max </Th> </Tr> <Tr> <Th> Kelvin </Th> <Td> 184 K </Td> <Td> 288 K </Td> <Td> 330 K </Td> </Tr> <Tr> <Th> Celsius </Th> <Td> − 89.2 ° C </Td> <Td> 15 ° C </Td> <Td> 56.7 ° C </Td> </Tr> <Tr> <Th> Fahrenheit </Th> <Td> − 128.5 ° F </Td> <Td> 59 ° F ( 15 ° C ) </Td> <Td> 134 ° F ( 57 ° C ) </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th colspan="2"> Atmosphere </Th> </Tr> <Tr> <Th> Surface pressure </Th> <Td> 7005101325000000000 ♠ 101.325 kPa ( at MSL ) </Td> </Tr> <Tr> <Th> Composition by volume </Th> <Td> <Ul> <Li> 78.08 % nitrogen ( N ; dry air ) </Li> <Li> 20.95 % oxygen ( O ) </Li> <Li> 0.930 % argon </Li> <Li> 0.0402 % carbon dioxide </Li> <Li> ~ 1 % water vapor ( climate
what is the size of earth in km
what is the size of earth in km
40 075.017 km
40 075.017 km