Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991baicz..42..199p&link_type=abstract
Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 42, no. 3, June 1991, p. 199-204.
Astronomy and Astrophysics
Astronomy
4
Aquarid Meteoroids, Halley'S Comet, Meteoroid Showers, Orionid Meteoroids, Astronomical Observatories, Cosmic Dust, Visual Observation
Scientific paper
Almost 300 observers from all over the world took part in visual observations of the meteor showers associated with Comet P/Halley under the direction of the International Halley Watch. A preliminary analysis is presented of the accumulated data on the Eta Aquarid (1984 - 1987) and Orionid (1982 - 1987) meteor showers. Due to a large spread in the reliability of the meteor counts, selection criteria were established which eliminated one quarter of the data. The activity of the Eta Aquarid shower appears to be much higher than that of the Orionid shower. The former has a sharp but typical double maximum at solar longitudes of 44.5 and 46.5 degrees whereas the latter has multipeaked activity with a flat maximum between 206.5 - 210.5 degrees. The total activity period of each of the showers exceeds one month and the half-maximum period is about 7-8 days. The results are consistent with the ribbon model of the Halley particle stream.
Hajduk Agnieszka
McIntosh Bruce A.
Porubčan Vladimir
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