Physics
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ncimc...7..447c&link_type=abstract
Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol. 7 C, July-Aug. 1984, p. 447-457.
Physics
2
Halley'S Comet, Interplanetary Space, Meteoroid Showers, Orbital Mechanics, Orionid Meteoroids, Particle Flux Density, Flyby Missions, Mass Distribution, Particle Mass, Particle Size Distribution, Particle Trajectories, Perihelions
Scientific paper
On the basis of simultaneous observations of the Orionid meteor shower in Italy and Czechoslovakia during the period 1978-1982 the flux densities of meteor particles in the near-perihelion distances have been derived and related to previous results of observations of the shower associated with Comet Halley. A maximum flux rate of 2 per 10 billion sq m per sec has been obtained for the particles of the mass range higher than 1,000,000 kg at the distances of 0.09-0.005 A.U. from the orbit of the comet. The flux in the most inner core of the stream, relative to the particles of the mass range lower than 1,000,000 kg, is controlled by the fresh cometary ejecta and hence depends on the mass-loss rate of the comet and on its gas/dust relation. The meteor shower observations yield a mass loss rate of solid particles of 33 million kg/revolution. This value increases the hazard of the space experiments by more than one order of magnitude.
Cevolani Giordano
Hajduk Agnieszka
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