Re: Smith-Tuttle Comet a threat to earth?

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#164

From: Dave Tholen
Date: Sat, 31 Oct 1992 07:09

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Jack Romachek writes:

> Strange.  I did a calculation using the orbital elements from IAU
> Circular 5636 and had the comet returning to perihelion on 17 Dec. 2127,
> when according to the circular should happen 11 July 2126.  That
> is approximately the same time difference encountered above.  Will including 
> planetary perturbations cause the comet to arrive 17 months earlier than
> a strictly two-body (comet+sun) calculation?

Yes.  That and whatever non-gravitational terms Marsden assumed for his
extrapolation to the next perihelion passage.

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Path: arc1-ca.pugleaf.net!sparky!uunet!think.com!ames!news.hawaii.edu!galileo!tholen
From: tholen@galileo.ifa.hawaii.edu (Dave Tholen)
Subject: Re: Smith-Tuttle Comet a threat to earth?
Message-ID: <1992Oct31.070930.16642@news.Hawaii.Edu>
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Date: Sat, 31 Oct 1992 07:09:30 GMT
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