Computer Science
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pimo.conf...99r&link_type=abstract
Proceedings of the International Meteor Conference, Roden, The Netherlands, 14-17 September, 2006 Eds.: Bettonvil, F., Kac, J. I
Computer Science
Scientific paper
An analysis of magnitude and rate data for meteoros labelled as sporadic in the Visual Meteor DataBase (VMDB) is presented. The sample consists of meteors which are not associated with any shower of the working list. Possible sources of sporadic meteors are niisaligned shower meteors, unresolved minor showers, as well as meteors from toroidal and apex sources. The major characteristics derived from the sample can beattributed to the apex source. We find an annual average of the population index r = 2.95+-0.15 with a minimum near solar longitude 80 deg and a maximum near solar longitude 270 deg. Meteors associated with the region of the apex of the Earths orbital motion yield an annual average ZHR of about 22 with peak values of 25 in late August/early September and end-January. Comparisons are made with recent1y published radar flux profiles. Despite the fact that the meteor populations are quite different (about 5 magnitudes), we find coinciding features of the flux and ZHR profiles around solar longitude 85 deg (minimum) and maxima around solar longitude 150 deg and 290-300 deg.
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