Electronic Telegram No. 2357
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat@iau.org; cbatiau@eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html


2010 JUNE BOOTID METEORS
     P. Jenniskens, SETI Institute, reports that elevated rates of the June
Bootid meteors (IAU Shower 170) were predicted for 2010 June 23-24 in
calculations by J. Vaubaillon and P. Jenniskens (Jenniskens 2006, *Meteor
Showers and Their Parent Comets*, Cambridge University Press, p. 674), when
the earth was calculated to cross the 1836, 1830, 1825, and 1819 dust ejecta
of comet 7P/Pons-Winnecke at June 23d22h40m, 24d00h07m, 24d01h22m, and
24d03h53m UTC, respectively.  A 94-percent-lit moon in Sco made for poor
observing conditions.  Subsequently, several observers have reported
significant June Bootid activity in low-light-level video observations,
lasting from about June 23d22h until June 24d06h UT.  Rates peaked at a
zenith hourly rate of 5 +/- 2 meteors/hr.  Javor Kac, Slovenia, observed
nine June Bootids and eight sporadic meteors in five hours of observing time
during June 23.9-24.1.  That same night, Enrico Stomeo, Italy, recorded
fifteen June Bootids among 97 meteors total with three cameras (stellar
limiting magnitude 3.8) during 6.2, 5.1, and 6.2 hours of observing,
respectively; video magnitudes were in the range -1.4 to +2.6.  Michel
Vandeputte observed visually from Frasnes, Belgium, and detected three June
Bootids during June 23d23h45m-24d01h20m UT.  Paul Martsching at McFarland
Park, IA, USA, saw five June Bootids and seven sporadic meteors under moonlit
skies between June 24d03h15m and 05h45m UT (stellar limiting magitude 4.9).


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 July 8                      (CBET 2357)              Daniel W. E. Green