Semimajor axis (a): 
6378.1370 km

Reciprocal of flattening (1/f): 
298.257223563

Angular velocity of Earth (w): 
7292115.0 x 10^{11} rad/s

Earth's Gravitational Constant (Atmosphere
incl.) (GM): 
3986004.418 x 10^{8} m^{3}/s^{
2}

Semiminor axis (b) 
6356.7523142 km

Flattening ( f = (a  b) / a ) 
0.003352811

Linear eccentricity ( ) 
521.854008974 km

Eccentricity (e= E / a ) 
0.081819

Polar gravity ( _{p} ) 
9.8321849378 m s^{ 2}

Equatorial gravity ( _{e} ) 
9.7803253359 m s^{ 2}

Somigliana's Constant ( ) 
1.931853 x 10^{3}

Gravity ratio ( ) 
0.003449787
