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  • 1
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    Surface of young Jupiter family comet 81P/Wild 2: view from the Stardust Spacecraft (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-06-19
    Description: Images taken by the Stardust mission during its flyby of 81P/Wild 2 show the comet to be a 5-kilometer oblate body covered with remarkable topographic features, including unusual circular features that appear to be impact craters. The presence of high-angle slopes shows that the surface is cohesive and self-supporting. The comet does not appear to be a rubble pile, and its rounded shape is not directly consistent with the comet being a fragment of a larger body. The surface is active and yet it retains ancient terrain. Wild 2 appears to be in the early stages of its degradation phase as a small volatile-rich body in the inner solar system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brownlee, Donald E -- Horz, Friedrich -- Newburn, Ray L -- Zolensky, Michael -- Duxbury, Thomas C -- Sandford, Scott -- Sekanina, Zdenek -- Tsou, Peter -- Hanner, Martha S -- Clark, Benton C -- Green, Simon F -- Kissel, Jochen -- New York, N.Y. -- Science. 2004 Jun 18;304(5678):1764-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Astronomy, University of Washington, Seattle, WA 98195, USA. brownlee@astro.washington.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15205524" target="_blank"〉PubMed〈/a〉
    Keywords: Cosmic Dust ; Gases ; *Meteoroids ; Spacecraft ; Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Dust measurements in the coma of comet 81P/Wild 2 by the Dust Flux Monitor Instrument (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-06-19
    Description: We present measurements of the dust particle flux and mass distribution from the Stardust Dust Flux Monitor Instrument (DFMI) throughout the flyby of comet 81P/Wild 2. In the particle mass regime from 10(-14) to 10(-7) kilograms, the spacecraft encountered regions of intense swarms of particles, together with bursts of activity corresponding to clouds of particles only a few hundred meters across. This fine-scale structure can be explained by particle fragmentation. We estimate that 2800 +/- 500 particles of diameter 15 micrometers or larger impacted the aerogel collectors, the largest being approximately 6 x 10(-7) kilograms, which dominates the total collected mass.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tuzzolino, Anthony J -- Economou, Thanasis E -- Clark, Ben C -- Tsou, Peter -- Brownlee, Donald E -- Green, Simon F -- McDonnell, J A M -- McBride, Neil -- Colwell, Melusine T S H -- New York, N.Y. -- Science. 2004 Jun 18;304(5678):1776-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, 933 East 56th Street, Chicago, IL 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15205527" target="_blank"〉PubMed〈/a〉
    Keywords: *Cosmic Dust ; Gases ; *Meteoroids ; Spacecraft
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    The Cometary and Interstellar Dust Analyzer at comet 81P/Wild 2 (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-06-19
    Description: The CIDA (Cometary and Interstellar Dust Analyzer) instrument on the Stardust spacecraft is a time-of-flight mass spectrometer used to analyze ions formed when fast dust particles strike the instrument's target. In the spectra of 45 presumably interstellar particles, quinone derivates were identified as constituents in the organic component. The 29 spectra obtained during the flyby of Comet 81P/Wild 2 confirm the predominance of organic matter. In moving from interstellar to cometary dust, the organic material seems to lose most of its hydrogen and oxygen as water and carbon monoxide. These are now present in the comet as gas phases, whereas the dust is rich in nitrogen-containing species. No traces of amino acids were found. We detected sulfur ions in one spectrum, which suggests that sulfur species are important in cometary organics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kissel, J -- Krueger, F R -- Silen, J -- Clark, B C -- New York, N.Y. -- Science. 2004 Jun 18;304(5678):1774-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Aeronomie, Max-Planck-Strasse 2, D-37191 Katlenburg-Lindau, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15205526" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/analysis ; Carbon/analysis ; Cosmic Dust/*analysis ; Gases ; Hydrogen/analysis ; Ice ; Ions ; Mass Spectrometry/instrumentation ; Metals, Heavy/analysis ; *Meteoroids ; Nitrogen/analysis ; Organic Chemicals/*analysis ; Oxygen/analysis ; Sulfur/analysis ; Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
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