Assessment of the possibility of avoiding the collision of the earth with a cosmic body

Details Assessment of the possibility of avoiding the collision of the earth with a cosmic body Assessment of the possibility of avoiding the collision of the earth with a cosmic body

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mala.iafcq....s&link_type=abstract

IAF, International Astronautical Congress, 40th, Malaga, Spain, Oct. 7-13, 1989. 9 p.

Astronomy and Astrophysics

Astronomy

Celestial Mechanics, Collision Avoidance, Earth-Moon System, Kepler Laws, Meteorite Collisions, Center Of Mass, Evasive Actions, Solar Orbits

Scientific paper

A method that could be used for avoiding the collision, or a dangerous approach to it, of the earth with a cosmic body is considered. The method involves changing the location of the earth on the orbit at a given moment by imparting a moderate velocity impulse to the moon. Estimates of the needed earth deviation with respect to its position in an undisturbed motion are presented, together with allowable safe distances between a passing-by body and the earth, determined as a function of the body's mass. The required energy expenditures and the fraction of the moon's ejected mass necessary to impart the required velocity impulse to the moon are also estimated.

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