Tom Van Flandern posted the following
message to the internet regarding
the 3600 year orbit of Planet X.
From: firstname.lastname@example.org (Tom
Subject: Re: 10th planet?
Date: 1 May 1994 16:40:02 GMT
As for Planet X, the topic of this thread, its orbit could not have a
period of 3600 years and approach the Sun closer than Jupiter, as Sitchin
suggested, because such an orbit is unstable. Its period would be drastically
altered in a single revolution, and it would eventually collide with Jupiter
or get ejected from the solar system....
....Even if giant Jupiter came galloping into the inner solar
system, its tidal effects on Earth would be negligible unless it came quite
close. But the probability of such a close approach is very small; and
again, such an orbit is highly unstable and would soon be eliminated. For
example, comets in such orbits cannot survive longer than about 100,000