科研之友
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摘要
In this study, we conduct a detailed analysis of the Kosice meteorite fall (February 28, 2010), to derive a reliable law describing the mass distribution among the recovered fragments. In total, 218 fragments of the Kosice meteorite, with a total mass of 11.285kg, were analyzed. Bimodal Weibull, bimodal Grady, and bimodal lognormal distributions are found to be the most appropriate for describing the Kosice fragmentation process. Based on the assumption of bimodal lognormal, bimodal Grady, bimodal sequential, and bimodal Weibull fragmentation distributions, we suggest that, prior to further extensive fragmentation in the lower atmosphere, the Kosice meteoroid was initially represented by two independent pieces with cumulative residual masses of approximately 2 and 9kg, respectively. The smaller piece produced about 2kg of multiple lightweight meteorite fragments with the mean around 12g. The larger one resulted in 9kg of meteorite fragments, recovered on the ground, including the two heaviest pieces of 2.374kg and 2.167kg with the mean around 140g. Based on our investigations, we conclude that two to three larger fragments of 500-1000g each should exist, but were either not recovered or not reported by illegal meteorite hunters.
- 出版日期2014-3
