(meteorobs) IMO Shower Circ.: June Bootids 2004

RainerArlt rarlt at aip.de
Fri Jun 25 16:02:08 EDT 2004



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           I M O   S h o w e r   C i r c u l a r
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                 June Bootids, VISUAL DATA

Enhanced activity of the June Bootid meteor shower was
predicted by three independent numerical modelling
attempts by Sato, Shanov, Dubrowskiy, and Vaubaillon
which were confirmed by Lyytinen. Times given covered 
roughly June 23, 10h to 19h UT.

Average ZHRs from visual observations of the 2004 June
Bootids are compiled below. Significant activity was
found by the observers. Because of the limited tempo-
ral resolution of the activity profile, the peak time
is still very vague, perhaps near 13h30 UT. We would
like to thank the observers

 Shlomi Eini, Gunnar Glitscher, Lew Gramer, Robin Gray,
 Daniel Gruen, Takema Hashimoto, Roberto Haver, Javor 
 Kac, Richard Kramer, Anna Levina, Robert Lunsford, Pierre 
 Martin, Mikhail Maslov, Minoru Muraki, Kouji Ohnishi, 
 Koetsu Sato, Mikiya Sato, Tomoko Sato, Sergey Shanov, 
 Wesley Stone, Kazumi Terakubo, Shigeo Uchiyama, Jan 
 Verfl, and Kim Youmans

whose data were used for the below activity profile.

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Date (UT)   Time  Solarlong   nINT   nJBO    ZHR
------------------------------------------------------
Jun 22.67  16:05   91.5050      4      5      3  +-  1
Jun 22.95  22:48   91.7720     10     10      3  +-  1
Jun 23.21  05:02   92.0200      6     56     11  +-  1
Jun 23.42  10:05   92.2200      6     47      8  +-  1
Jun 23.55  13:12   92.3440      6     42     49  +-  7
Jun 23.62  14:53   92.4110      4     10     23  +-  7
Jun 23.66  15:50   92.4490      5     18     19  +-  4
Jun 23.71  17:02   92.4970      5      5      9  +-  4
Jun 24.11  02:38   92.8790      6      3      1  +-  1
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A few observations with large correction factors due to 
unfavourable conditions were omitted from the analysis.
A population index of r = 2.2 was used. The radiant was
assumed at alpha=223, delta=+47, zenithal attraction was
taken into account for each individual observing period.

Rainer Arlt
2004 Jun 25



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