From: Vladimir Krumov, International Meteor Organization
Date: November 2001 

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            International Meteor Organization
                 Meteor Shower Circular

               2 0 0 1    L E O N I D S
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This year's Leonids were marked from excellent lunar conditions. The weather
was also very friendly to most of the observers around the world.

The strongest peak observed is around 18h20min UT which was suitably
situated for the observers in East Asia and Australia. The rates during this
peak reached more then 2800 meteors per hour. This is well below the
theoretically predicted peak levels which were around 5000 according to
Lyytinen/Nissinen/van Flaudern or 8000 in Asher/McNaught's model.

As far as the first peak, observed from America, is concerned rates were
between 1000 and 1500 meteors per hour. However there is still not enough
data reported from it especially about the time after 11 UT.

The first activity profile is derived from the observations of 38 observers.
It is aimed to give a general view of the observed shower and no conclusions
can be made on this stage. The following detail analysis will tell us more
about the shower and the dust trail models.

Data of the following observers is included in the preliminary profile. The
countries in brackets show the place where observations were carried out,
not necessarily his home land :
Albert Kong (USA), Andreas Buchman (Germany), Andrzej Skoczewski (Poland),
Antonio Martinez (Venezuela), Brian Shulist (Canada), Camila Bacher (USA),
Carles Pineda Ferre (Spain), Detlef Koschny(Australia), Francisco A.
Rodriguez Ramirez (Spain), Gaurav Rathod (India), Ina Rendtel (Germany),
James Bedient (USA), Jaydeep Belapure (India), Joe Zemder (Australia), Josep
M. Trigo-Rodriguez (Spain), Joseph Zammit (Malta), Kamil Hornoch (Pland),
Ken Hodonsky (USA), Kim Youmans (USA), Marion Rudolph (Germany),Mark Davis
(USA), Martin Galea De Giovanni (Malta), Mayuresh Girish Prabhune (India),
Michael Doyle (USA), Miguel A. Serra (Spain), Mike Linnolt (USA), Rafael
Haag (Brazil), Rainer Arlt (Korea), Robert Lunsford (USA), Shigeo Uchiyama
 Japan), Sirko Molau (Korea), Tom Roelandts (China), Tomislav Jurkic
(Croatia), Umberto Mul? Stagno (Tunis), Valentin Velkov (Bulgaria), Werner
Hamelinck (China), Xiaorong Wang (China), Zhou Xingming (China)


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Date Time Sollong Nint Nobs ZHR  +/-
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18   0100 235.732  23   8    52   4
18   0300 235.816  22   9    80   3
18   0500 235.900  21   8    95   5
18   0630 235.963  11   5   160  10
18   0730 236.005  15   7   200  10
18   0815 236.036  13   5   150  10
18   0845 236.057  15   5   270  15
18   0915 236.078  18   6   430  20
18   0945 236.099  12   6   570  20
18   1015 236.121  17   6   790  25
18   1045 236.142  20   5  1000  25
18   1130 236.173   8   2   400  40
18   1300 236.236  12   2   370  25
18   1430 236.299   9   1   320  20
18   1530 236.341  16   3   490  30
18   1630 236.383  16   3   780  40
18   1700 236.404  16   4  1100  50
18   1730 236.425  18   4  1550  50
18   1800 236.446  20   5  2320  60
18   1820 236.460  28   7  2850  60
18   1840 236.474  32   7  2430  50
18   1900 236.488  21   6  1580  50
18   1920 236.509  18   5  1160  40
18   1940 236.516  17   5  1020  40
18   2000 236.530  17   7   800  30
18   2030 236.551  13   5   470  20
18   2120 236.587  16   5   150  10
18   2220 236.629   7   4   130  10
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Calculations are made for population index r=2.0. Nint is the number of
intervals observing intervals in a certain period. Nobs is the number of
different observers in it.

Many thanks to all the observers that have contributed their data. Also to
the favorable weather conditions whish are not so typical for this part of
the year.