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Astron. Astrophys. 357, 777-781 (2000)

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Leonid meteor stream from Ondejov radar observations in 1965-1967

M. imek and P. Pecina

Astronomical Institute of the Academy of Sciences of the Czech Republic, 251 65 Ondejov, Czech Republic

Received 26 August 1999 / Accepted 9 March 2000

Abstract

Results of Ondejov radar observations of Leonid meteor shower in 1965-1967 are presented. Observations performed during previous returns of Leonid meteor showers indicate that both in 1965 and 1966 the peak activity was observed at almost the same solar longitude near [FORMULA]. The activity pattern in 1965 showed two well pronounced peaks separated by 23 hours where the second one seemed to be the principal. This is true both with respect to activity as well as the flux. Our observations indicate that the main outburst of this Leonid return occurred in 1966, the activity ratio to 1965 was 1.2 while the corresponding ratio in fluxes was 3.7. The 1967 activity is characterized by a large scatter of observed hourly echo counts fluctuating around 15 which is slightly above the level in the intermediate years of Leonid activity. The dependence of the radio echo duration on the velocity, radiant position, the height of maximum ionization and the mass of particular meteoroid is also presented.

Key words: comets: individual: 55P/Tempel-Tuttle – meteors, meteoroids

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© European Southern Observatory (ESO) 2000

Online publication: June 5, 2000
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