Other
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.495..113n&link_type=abstract
In: Proceedings of the Meteoroids 2001 Conference, 6 - 10 August 2001, Kiruna, Sweden. Ed.: Barbara Warmbein. ESA SP-495, Noordw
Other
4
Meteor Shower, Orbital-Diversity Criterion
Scientific paper
Recently, two new criteria of diversity of Keplerian orbits have been suggested, that by Valsecchi, Jopek, and Froeschlé (VJF) in 1999, and orbital-momentum-based (OMB) criterion by Neslušan in 2001. In the presented paper, there is a comparison of how the classic, Southworth-Hawkins (SH) criterion from 1963, and both new criteria behave, when these are used in the separation of several major meteor showers from the photographic IAU MDC database. The cumulative-number-on-threshold-D-dependence method, based on work by Sekanina from the beginning of 1970s, is utilized to perform an optimal separation. The quality of separation is evaluated with the help of "background-number-density test" (described here in more detail). No essential difference among the particular criteria was found. A relatively worse result is obtained using SH criterion for Perseids. The separation method does not work with the VJF and OMB criteria for the α-Capricornids, and with OMB criterion for the Northern as well as Southern δ-Aquarids. No criterion is sufficient for the optimal separation of Geminids. If the best criterion has to be chosen, the VJF one seems to be a little more appropriate than the others.
Neslusan Luboš
Welch P. G.
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