On the Presence of Persistent Trains in Leonid Fireballs from 1998, 1999 and 2000 Spanish Meteor Observations

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Scientific paper

The properties of Leonids and its persistent trains produced from fireballs are investigated with visual records carried out by SOMYCE members from 2616 fireballs brighter than visual magnitude -2 which left 663 persistent trails of known duration. The "population index", tau, for the train distribution in 1998 was tau=0.838+-0.053 for the interval [=<0.5 s, 8 s], tau=0.979+-0.010 from the interval [10 s, 30 s], and tau=0.995+-0.049 for the interval [35 s, 600 s]. In 1999, tau was lower: tau=0.468+-0.166 for the interval [0.5 s, 7 s], while in the 2000 data, similar values as from the 1998 observations are found with tau=0.976+-0.255 for [=<0.5 s, 150 s]. These values are greater than the usual ones of sporadic fireballs with 0.67+-0.01.

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