Earth

Planet earth has mass 5.972e24 kg and radius 6.378e6 m

Low Earth Orbit

Period Semi Major Axis Altitude Kinetic Energy

Planet earth Period 1.5 hr 6.653e6 m 0 2.996e7 J

2 8.06e6 1.395e6 m 2.473e7

3 1.056e7 1.887e7

5 1.485e7 1.342e7

10 2.357e7 8.456e6

The acceleration of gravity at earth surface is 9.75 m/s^2 .

The orbit of the GPS satellite at 26.61e6 m is shown. The period is 4.32e4 sec, 12 hrs. Eccentricity is 0.

The orbit of the geostationary satellite at 42.24e6 m is shown. The period is 8.64e4 sec, 24 hrs. Eccentricity is 0.

The orbit of a100- kg mass at 6.559e6 m , earth surface, is shown. The period is 5286 sec,= .06119 day . Eccentricity is 0. Gravitational acceleration is -9.26 m/s^2.

The orbit of a100 kg mass at 6.478e6 m , 100 km above earth surface, is shown. Velocity is 7.84e3 m/s

The orbit of a100 kg mass near escape velocity at earth surface. Eccentricty is .95 . Perihelion is set equal to earth radius.

The orbit of a100 kg mass near escape velocity at earth surface. Velocity is 1.1e4 m/s. Escape velocityis 1.118 e4 m/s