Analysis of identified iron meteoroids: Possible relation with M-type Earth-crossing asteroids?

Details Analysis of identified iron meteoroids: Possible relation with M-type Earth-crossing asteroids? Analysis of identified iron meteoroids: Possible relation with M-type Earth-crossing asteroids?

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...292..330r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 292, no. 1, p. 330-336

Statistics

Computation

9

Asteroid Belts, Asteroids, Computational Astrophysics, Iron Meteorites, Meteorology, Ablation, Astronomical Models, Earth Orbits, Mathematical Models, Trajectories

Scientific paper

We have used two different techniques to analyze the U. S. Prairie Network (PN) fireballs in order to search for possible nickel-iron meteoroids. The first approach used is that of ReVelle and Rajan which is similar to the analysis carried out earlier by Wetherill and ReVelle in a series of papers relating first to the chondrites and later to fireballs of cometary origin. The second approach is a new technique developed by Ceplecha and co-workers that can simultaneously determine the presence and location of gross fragmentation events and also determine an effective ablation parameter during the fireball entry. Using this combined approach we have determined that seven fireballs among the 287 that were analyzed are likely to be iron in composition. Using the method of Ceplecha we have determined that none of these objects experienced any gross fragmentation events during their entry to the atmosphere and most of the meteoroids also exhibited rather large ablation coefficients during entry as well, a feature that is also characteristic of the ReVelle and Rajan approach. For all of these objects for which we currently have available data, we have determined that gross fragmentation events did not occur during the entry.

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