Dynamical and orbital properties of the Aricebo micrometeors

D. Janches, D. D. Meisel, J. D. Mathews

    Research output: Contribution to journalArticle

    Abstract

    Using the Arecibo Observatory (AO) 430 MHz Radar we have developed a Doppler technique to measure very precise micrometeor instantaneous velocities directly from the meteor head-echo. In addition, a large number of these observations show deceleration. With the velocity, the deceleration, the assumption of a spherical shape, and a mean micrometeoroid mass density (3 g cm{combining triple dot above}) we have obtained estimates of in-atmosphere particle sizes. Therefore we can produce a more realistic orbital analysis than previously obtained for micrometeors. We first use an MSIS standard atmosphere model and the measured deceleration in order to obtain the meteor extra-atmospheric speeds, assuming that sputtering is the only mass-loss mechanism that these particles undergo prior and during the time we detect them. So far, over 7000 detections obtained during the Leonids 1997 (L97) and 1200 during the Leonids 1998 (L98) observation campaigns have been analyzed. Out of these detections, we present elements without correction for perturbations (i.e. radiation pressure, perturbation by the Jovian planets and photoelectric charging effects) of over 500 events from 1997 and 200 from 1998.

    Original languageEnglish (US)
    Pages (from-to)34-37
    Number of pages4
    JournalCOSPAR Colloquia Series
    Volume15
    Issue numberC
    DOIs
    StatePublished - Dec 1 2002

    Fingerprint

    micrometeoroids
    Deceleration
    meteor
    deceleration
    meteoroids
    perturbation
    orbitals
    atmosphere
    reference atmospheres
    planet
    observatory
    particle size
    radiation pressure
    radar
    Observatories
    Planets
    Sputtering
    charging
    planets
    echoes

    All Science Journal Classification (ASJC) codes

    • Aerospace Engineering
    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Janches, D. ; Meisel, D. D. ; Mathews, J. D. / Dynamical and orbital properties of the Aricebo micrometeors. In: COSPAR Colloquia Series. 2002 ; Vol. 15, No. C. pp. 34-37.
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    Dynamical and orbital properties of the Aricebo micrometeors. / Janches, D.; Meisel, D. D.; Mathews, J. D.

    In: COSPAR Colloquia Series, Vol. 15, No. C, 01.12.2002, p. 34-37.

    Research output: Contribution to journalArticle

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    AU - Mathews, J. D.

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