[IAUC] CBET 2416: 20100817 : 2010 PERSEID METEORS
quai en cfa.harvard.edu
quai en cfa.harvard.edu
Mar Ago 17 17:26:42 ART 2010
Electronic Telegram No. 2416
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 en iau.org; cbatiau en eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html
2010 PERSEID METEORS
P. Jenniskens, SETI Institute, reports that Geert Barentsen (Armagh
Observatory) has pointed out that the International Meteor Organization's
summary of visual meteor observations (which can be viewed at website URL
http://www.imo.net/live/perseids2010/#peak) shows that the Perseid rate
increased around Aug. 12d17h18m +/- 32m UT by about 60 +/- 15 meteors/hr (ZHR)
above normal annual shower activity levels on that date (solar longitude
139.748 +/- 0.022 deg, equinox 2000.0), in good agreement with predictions for
the earth's crossing of the 1479 dust ejecta from comet 109P/Swift-Tuttle
(cf. CBET 2401). The predicted peak rate was ZHR = 65 meteors/hr (Jenniskens,
2006, *Meteor Showers and their Parent Comets*, p. 657). These data are
based on roughly ten visual observers located in China, Russia, Japan, and
Israel.
S. Nakano, Sumoto, Japan, forwards the following visual counts by
Katsuhiko Mameta (Kobe, Hyogo-ken) at Nishi-Harima Observatory on Aug. 12
(limiting mag 6.0-6.3): 15h30m-16h00m UT, 22 Perseids, 10 other meteors;
16h00m-16h50m, 29 Perseids, 17 others; 18h05m-19h00m, 37 Perseids, 17 others.
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2010 CBAT
2010 August 17 (CBET 2416) Daniel W. E. Green
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