• Unperturbed geostationary semimajor axis = 42164.2 km
• Orbital mean semimajor axis = 42165.8 km
• Effective geostationary radius = 42164.5 km
• Gravitational constant G = 6.67x10^-11 N m² kg^-2
• Earth mass Me = 5.98x10²⁴ kg
• Earth central gravity constant k = GMe = 398600.440 km³ s^-2
• Earth sidereal rotation rate = 360.985647 deg/day = 0.729211585x10^-4 rad s^-1
• One sidereal day = 86164 sec
• Geostationary orbital velocity = 3075 m s^-1
• Stable nodes at 75.1 E and 105.3 W
• Unstable nodes at 11.5 W and 161.9 E
• Solar radiation pressure at geo orbit = 4.56x10^-6 N m^-2
• Earth equatorial radius = 6378.144 km
• Earth oblateness f = 1/298.257
• Geostationary altitude = 35787 km
• Ionospheric range delay 40.3 Ne / f² / sin(elev)
• Speed of light c = 299792.458 km s^-1

Note: A geostationary satellite strictly refers to a vehicle that appears not to move at all in the sky (from a fixed ground site), whereas a geosynchronous satellite may have a non-zero inclination to the equatorial plane. This type of satellite will display a figure eight pattern in the sky with a period of one day. No satellite is truly geostationary as all geosats are subject to various perturbations, and will drift slightly, requiring control maneuvres to keep them 'on station'.