LUNAR-SOLAR PERTURBATIONS OF THE ORBIT OF AN EARTH SATELLITE
TRW SPACE TECHNOLOGY LABS LOS ANGELES CA LOS ANGELES
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An analysis of lunar-solar perturbations was made. It is assumed that the Kepler ellipse of the satellite is perturbed only by the sun and moon, ignoring, for the moment, the perturbations of the orbit by the earths oblateness and atmosphere. It is also assumed that the angular velocities of the sun and moon are small enough compared to the angular velocity of the satellite to consider the sun and moon fixed during one revolution of the satellite. This simplifying assumption makes possible the integration of the instantaneous rate of change of the orbital elements over one revolution of the satellite to obtain the change in orbital elements per revolution. The magnitude of the error made by holding the disturbing body fixed is estimated. The results are applied to the orbit of Able-3 1959 delta.
- Unmanned Spacecraft
- Celestial Mechanics