Bolide aida: Death of an aubrite meteoroid

David D. Meisel, Vladimir S. Getman, John David Mathews, S. C. Jacobs, Robert O. Roper

    Research output: Contribution to journalArticlepeer-review

    5 Scopus citations

    Abstract

    A bright, slow moving, bolide observed during the 1989 AIDA campaign is shown to have been a very unusual near-Earth meteoroid. Data were obtained with five different instruments and these observations have now been extensively analyzed. Various indicators point to a stony object and spectroscopic observations in the near IR show two Fe I emissions with an excitation temperature of 3100 K. A third feature due to Na I gives an abundance ratio of Na to Fe of 1:1 by number. Ionized calcium (which is often strong in the near UV), manganese, and cobalt appear to have been weak or absent. Based on the spectrum analysis, we conclude that the object was an enstatite meteoroid and the lack of Mn compared with Fe and Na suggests an aubrite composition. The lightcurve, aerodynamic analysis, and video images show the object underwent extensive fragmentation at virtually all points of its trajectory.

    Original languageEnglish (US)
    Pages (from-to)227-254
    Number of pages28
    JournalIcarus
    Volume116
    Issue number2
    DOIs
    StatePublished - Jan 1 1995

    All Science Journal Classification (ASJC) codes

    • Astronomy and Astrophysics
    • Space and Planetary Science

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