Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984avest..18..137k&link_type=abstract
(Astronomicheskii Vestnik, vol. 18, Apr.-June 1984, p. 137-144) Solar System Research (ISSN 0038-0946), vol. 18, no. 2, Oct. 198
Astronomy and Astrophysics
Astronomy
Meteoroid Showers, Orbital Mechanics, Solar Orbits, Geminid Meteoroids, Orbit Perturbation, Orbital Elements, Secular Variations
Scientific paper
The differentiation of short-period meteor swarms such as the Taurids and Geminids from the circumsolar meteor cloud and the evolution of their orbits over the period from 80,000 to 10,000 yrs ago are investigated analytically, using orbital elements calculated from published photographic observations and taking both secular perturbations by the giant planets and the Poynting-Robertson effect into account. The results are presented in tables and graphs and characterized in terms of the modified phase-distance (D) criterion of Southworth and Hawkins (1963). A cyclical variation of D is observed, and it is shown that the southern Taurids are unrelated to Comet Encke, whereas the northern Taurids approached it about 1500 and 5000 yrs ago. The results are considered consistent with the hypothesis of Alfven and Arrhenius (1979), that swarms form by gravitational focusing of separate orbits into a more or less compact grouping.
Kramer E. N.
Shestaka I. S.
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