Stellar perturbations of inner core comets and the impulse approximation

Details Stellar perturbations of inner core comets and the impulse approximation Stellar perturbations of inner core comets and the impulse approximation

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.282...13e&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 282, Issue 1, pp. 13-18.

Astronomy and Astrophysics

Astronomy

4

Comets: General

Scientific paper

A new method has been developed to calculate the perturbations caused by passing stars on inner core comets. It is a modification of the impulse approximation in which the star path is split up and several partial impulses are calculated, rather than taking a single impulse at closest approach. The new method is about 10-100 times faster than numerical integration, with which it gives good agreement. In a second line of investigation, it is found that, for small changes, stellar perturbations are as likely to reduce cometary perihelia as to increase them. Because the magnitude of a negative change in q is limited by an absolute boundary at q=0, a small number of very large positive deltaq values wil create the appearance of a positive tendency in changing q for many successive stellar perturbations.

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