The 1999 Leonids from Crimea

Details The 1999 Leonids from Crimea The 1999 Leonids from Crimea

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jimo...28..211b&link_type=abstract

WGN, Journal of the International Meteor Organization, vol. 28, no. 6, p. 211-221

Physics

Scientific paper

Restricted-field visual observations of the Leonid meteor shower were carried out on November 18, 1999, using the method of multiple count in the zenith, near the horizon, and with binoculars to study the population index and spatial density of the stream. The population index was derived in the range of absolute magnitudes from -8 to +9. It was revealed that the population index turns out to be non-linear over a large interval of stellar magnitudes, and it is approximated by a second-order curve. The shape of the logarithm-of-the-stream-density curve suggests that particles yielding meteors fainter than magnitude +10 are absent in the stream. The shower reached maximum activity at solar longitude lambda=235.287 (J2000.0, at 2h05m UT). The maximum was characterized by a rapid increase in spatial density -- 6 times for half an hour only. The population index in the night of the maximum does not show a regular course, and reflects the crossing of separated dust clouds by the Earth.

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