Materiały konferencyjne (WF)
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Browsing Materiały konferencyjne (WF) by Author "Jopek, Tadeusz J."
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Item Current status of the IAU MDC Meteor Showers Database(Wydawnictwo Naukowe Uniwersytetu im. Adama Mickiewicza w Poznaniu, 2014) Jopek, Tadeusz J.; Kanuchova, ZuzanaDuring the General Assembly of the IAU in Beijing in 2012, at the business meeting of Commission 22 the list of 31 newly established showers was approved and next o cially accepted by the IAU. As a result, at the end of2013, the list of all established showers contained 95 items. The IAU MDC Working List included 460 meteor showers, among them 95 had pro tempore status. The List of Shower Groups contained 24 complexes, three of them had established status. Jointly, the IAU MDC shower database contained data of 579 showers.Item On the atmospheric dynamics of the Tunguska cosmic body(ESA Publication Division, 2001-11) Foschini, Luigi; Longo, Giuseppe; Jopek, Tadeusz J.; Froeschle, Christiane; Gonczi, Robert; Michel, PatricWe studied the available scientific literature on the Tunguska event of 30 June 1908 to obtain parameter sets of the Tunguska Cosmic Body atmospheric dynamics. We performed a comparative analysis by means of available theoretical models and with the help of interplanetary dynamics, and we excluded unphysical orbits. Our results indicate a very high probability that the TCB was an asteroid.Item Study of meteoroid stream identification methods(Cambridge University Press, 2010) Rudawska, Regina; Jopek, Tadeusz J.We have tested the reliability of various meteoroid streams identification methods. We used a numerically generated set of meteoroid orbits (a stream component and a sporadic background) that were searched for streams using several methods.Item TV meteor streams searching(Astronomical Institute Slovak Academy of Sciences, Bratislava, 1993) Jopek, Tadeusz J.Using a modified D-criterion (threshold Do=0.2), among 531 TV meteor orbits, 23 streams has been identified. Adout 30% of the orbits belongs to the stream component. Only 3 streams have orbits inclined more than 30deg. Four streams have reciprocal orbits. The major stream Herculids shown to be a complex structure, sensitive on the choice of the D- threshold value. The Taurids complex differs slightly from the photographic one. The theta Piscids stream has very small orbit, the mean semi-major axis equals to 0.79AU. This stream seems to be TV component of the Eccentrides system, but with Do=0.21 the theta Piscids have joined S. Taurids. The TV Orionids appeared in two branches. One of them includes a single orbit which belongs to the eta Aquariids.