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Observations of the Leonids in Central Asia

Published online by Cambridge University Press:  14 August 2015

P.B. Babadzhanov
P.B. Babadzhanov*
Affiliation:
Institute of Astrophysics of the Tajik Academy of SciencesDushanbe 734042Tajikstan

Extract

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Observations in Central Asia in 1965-1966 by both photographic and radar methods allowed a determination of the radiants and orbits of Leonids (Babadzhanov and Getman 1970). Photographs showed that meteoroids undergo quasi-continuous fragmentation (QCF) in the Earth’s atmosphere. Taking account of QCF, the density of the Leonid meteoroids were found to lie between 1 and Agcm-3 the average being 2gcm-3 (Babadzhanov 1994), in agreement with the density range of between 0.2 and 6gcm-3 given by Maas et al (1990) for dust grains from comet P/1 Halley, with values below 0.6 being rare. Further, the icy grains have a density of about 1gcm-3 while silicate grains have a mean density 2.5 times higher.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 11 , Issue 2: Highlights of Astronomy. As presented at the XXIIIrd General Assembly of the IAU (Part B), 1997 , 1998 , pp. 1022
Copyright
Copyright © Kluwer 1998

References

Babadzhanov, P.B., (1990) Density of Meteoroids and their Mass Influx on Earth Asteroids, Comets, Meteors 1993 eds Milani, A. Di Martino, M. Cellino, A. Kluwer Academic Publishers, 45–54 Google Scholar
Babadzhanov, P.B. and Getman, T.I., (1970), Bull. Inst. Ast. Tajik Acad. Sci., 53, 3–6 Google Scholar
Maas, D., Krueger, F.R. and Kissel, J. (1990), Asteroids, Comets, Meteors III, eds Lagerkvist, C.-I., Hickman, H., Lindblad, B.A. and Lindgren, M., Uppsala Universitet Reprocentralen, 389–392 Google Scholar