Recognizing Leonid Meteoroids among the Collected Stratospheric Dust

摘要: Three chemical groups of primary “silicate” spheres < 30 µm in diameter cometary origin were collected the lower stratosphere between 1981 May and 1994 July. The sphere abundances represent an annual background from contributions by sporadic meteor weak shower activities. During two collection periods, 06/22 until 08/18, 1983 (U2015), 09/15–12/15, (W7027/7029), a higher number was compared to other periods year represented collectors studied here. This study links different data sets, viz. NASSA/JSC Cosmic Dust Catalogs peak activities showers, identified high-velocity sources for stratospheric spheres. majority on flag U2015 may originate comet P/Swift-Tuttle (Perseids), while flags W7027/7029 could be P/Halley (Orionids) or P/Tempel-Tuttle (Leonids). Variations relative proportions Mg,Si,Ca ± Al, Mg,Si Fe Si,Ca offer hint differences among comets. Proof findings reported here might obtained targeted cosmic dust collections including storm activity.