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    The Australian Desert Fireball Network: A new era for planetary science

    245569_245569.pdf (171.6Kb)
    Access Status
    Open access
    Authors
    Bland, Phil
    Spurný, P.
    Bevan, A.
    Howard, K.
    Towner, Martin
    Benedix, Gretchen
    Greenwood, R.
    Shrbený, L.
    Franchi, I.
    Deacon, G.
    Borovicka, J.
    Ceplecha, Z.
    Vaughan, D.
    Hough, R.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Bland, P. and Spurný, P. and Bevan, A. and Howard, K. and Towner, M. and Benedix, G. and Greenwood, R. et al. 2012. The Australian Desert Fireball Network: A new era for planetary science. Australian Journal of Earth Sciences. 59 (2): pp. 177-187.
    Source Title
    Australian Journal of Earth Sciences
    DOI
    10.1080/08120099.2011.595428
    ISSN
    0812-0099
    School
    Department of Applied Geology
    Remarks

    This is an Author's Accepted Manuscript of an article published in Australian Journal of Earth Sciences, Vol. 59, Issue 2, 2012 (copyright Taylor & Francis), available online at www.tandfonline.com

    URI
    http://hdl.handle.net/20.500.11937/16692
    Collection
    • Curtin Research Publications
    Abstract

    Through an international collaboration between Imperial College London, the Ondrejov Observatory in the Czech Republic and the Western Australian Museum, the installation of the Australian Desert Fireball Network in the Nullarbor Region of Western Australia was completed in 2007. Currently, the Network, which is the first to be established in the southern hemisphere, comprises four all-sky autonomous observatories providing precise triangulation of fireball records to constrain pre-atmospheric orbits and fall positions of meteorites over an area of approximately 200 000 km2. To date, the Network has led to the successful recovery of two observed meteorite falls. The first recovery was three fragments (174, 150 and 14.9 g) of the same meteorite fall recorded on 20 July 2007 at 19 h 13 m 53.2 s±0.1 s UT that were found within 100 m of the predicted fall line. Named Bunburra Rockhole, the meteorite is a basaltic achondrite with an oxygen isotopic composition (Δ 17O = -0.112 %) distinguishing it from basaltic meteorites belonging to the Howardite–Eucrite–Diogenite clan thought to be derived from asteroid 4Vesta, and therefore must have come from another differentiated asteroid in the terrestrial planet region. Bunburra Rockhole was delivered to Earth from an Aten-like orbit that was almost entirely contained within the Earth’s orbit. The second recovered fall was detected by the Network on 13 April 2010 and led to the recovery of a 24.54 g meteorite fragment that is yet to be fully described. To date, the Network has recorded ~550 fireballs. Records from which precise orbits and trajectories can be determined number ~150. In addition to the two recovered falls twelve fireballs are considered to have resulted in meteorite falls. Of these, four are probable falls (10’s–100 g), and five are certain falls (>100 g). Having proved the potential of the Network, ultimately a large dataset of meteorites with orbits will provide the spatial context for the interpretation of meteorite composition that is currently lacking in planetary science.

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