Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...506.1445s&link_type=abstract
Astronomy and Astrophysics, Volume 506, Issue 3, 2009, pp.1445-1454
Astronomy and Astrophysics
Astrophysics
2
Techniques: Photometric, Meteors, Meteoroids
Scientific paper
In 1999, 2001, 2002, and 2006 favourable returns of Leonids occurred and were observable, at least partly, from Central Europe. We present results on 54 photographically recorded multi-station Leonid fireballs and their probable identification from five individual dust trails or the Leonid Filament. Atmospheric behaviour was studied on the basis of beginning and terminal heights, dynamic pressures, PE coefficients, and light curves. The apparent non-dependence of beginning heights on initial photometric mass suggests the existence of a height hlim = 111 ± 5 km, which is the height where all Leonids reach an absolute magnitude of about -2^m. Three different shapes of the light curves were recognized and a recently implemented photometric method was used for the determination of the brightness of the Leonids. The precise heliocentric orbits and geocentric radiants for 34 Leonids with known times of meteor passage are also presented.
Shrbený Lukáš
Spurny Pavel
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