An Anomalous Basaltic Meteorite from the Innermost Main Belt

P. A. Bland, P. Spurny, M. C. Towner, A. W. R. Bevan, A. T. Singleton, W. F. Bottke, R. C. Greenwood, S. R. Chesley, L. Shrbeny, J. Borovicka, Z. Ceplecha, T. P. McClafferty (+6 others)
2009 Science  
An Anomalous Basaltic Meteorite from the This copy is for your personal, non-commercial use only. . clicking here colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others . here following the guidelines can be obtained by Permission to republish or repurpose articles or portions of articles (this information is current as of February 8, 2010 ): The following resources related to this article are available online at
more » ... encemag.org Triangulated observations of fireballs allow us to determine orbits and fall positions for meteorites. The great majority of basaltic meteorites are derived from the asteroid 4 Vesta. We report on a recent fall that has orbital properties and an oxygen isotope composition that suggest a distinct parent body. Although its orbit was almost entirely contained within Earth's orbit, modeling indicates that it originated from the innermost main belt. Because the meteorite parent body would likely be classified as a V-type asteroid, V-type precursors for basaltic meteorites unrelated to Vesta may reside in the inner main belt. This starting location is in agreement with predictions of a planetesimal evolution model that postulates the formation of differentiated asteroids in the terrestrial planet region, with surviving fragments concentrated in the innermost main belt.
doi:10.1126/science.1174787 pmid:19762639 fatcat:wrsci47hmzb5vj3chn3zl7r4la