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Re: Asteroid Problem



Tides depend on the DIFFERENCE between the forces
on two sides of the planet, not on the average force.
I am too busy right now to verify that the DIFFERENCE
in the case of our asteroids (10^19 or 10^20 kg situated
only 25,000 km away from the center of earth) is indeed
smaller than in the case of the moon.
Ludwik Kowalski

Jack Uretsky wrote:

Well, that's about 10^{-3} times the lunar mass, and the moon is about
60 earth radii away. Does that help?

On Tue, 28 Aug 2001, Ludwik Kowalski wrote:

Rick Tarara wrote:

With the earth moving at 30 km/s along its orbital path,
15 minutes will move the earth 2 diameters [from the
trajectory of the asteroid].

This begs for a question. How far should the m=10^19 kg
asteroid pass to avoid undesirable tides and earthquakes?
Ludwik Kowalski