Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977avest..10...73b&link_type=abstract
(Astronomicheskii Vestnik, vol. 10, Apr.-June 1976, p. 73-80.) Solar System Research, vol. 10, no. 2, Jan. 1977, p. 57-63. Tran
Astronomy and Astrophysics
Astronomy
Bolides, Meteorite Collisions, Meteoritic Composition, Tungusk Meteorite, Atmospheric Entry, Comets, Solar System
Scientific paper
Previously developed criteria for determining the deceleration and mass-loss rates of meteoroids in the atmosphere are applied to the Tungusk meteorite and selected Prairie Network bolides. It is shown that when their initial masses, velocities, and angles of incidence into the atmosphere are taken into account, the ratio between the disintegration heights of the meteorite and the bolides indicates a common nature and disintegration mechanism for these bodies. A technique is outlined for determining the densities of large bolide-like bodies in terms of their disintegration heights. Based on an analysis of selected bolide densities, it is concluded that: (1) most bright bolides were produced by friable low-density bodies; (2) the number of such bodies in the solar system is at least an order of magnitude greater than the number of stony and iron meteorites; (3) these bodies constitute a distinct class of small solar-system objects which may be called 'microcomets'; and (4) the Tungusk meteorite was the largest of these objects.
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