{"id":320,"date":"2010-08-27T21:50:06","date_gmt":"2010-08-27T21:50:06","guid":{"rendered":"http:\/\/bcmeteors.net\/wp\/2010\/08\/27\/2007-12-22-ursid-outbreak\/"},"modified":"2010-08-27T21:50:06","modified_gmt":"2010-08-27T21:50:06","slug":"2007-12-22-ursid-outbreak","status":"publish","type":"post","link":"https:\/\/bcmeteors.net\/?p=320","title":{"rendered":"2007 12 22 Ursid Outbreak"},"content":{"rendered":"

The 2007 Ursid Multi-Instrument Aircraft Campaign<\/strong><\/h2>\n<\/p>\n

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In late December Jenniskens headed the 2007 MAC Ursid campaign. The shower is produced by ejecta from Comet 8P\/Tuttle.<\/p>\n

The Ursids shower of 2007 were predicted to peak between 2000 to 22:12 UT which favoured European observers. Radio observation
permitted me to observe the shower despite cloud cover and being on the wrong continent. As a station in NASA’s Global Meteor
Scatter Network, I submitted my initial radio data. The data from my forward scatter station, along those from others, were utilized Ames Research Center for analysis of the 2007 Ursid shower<\/a>. <\/p>\n

The shower was shakedown flight for the 2008 Quadrantid Multi-Instrument Aircraft Campaign<\/a>, on January 3-4.<\/p>\n

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Electronic Telegram No. 1188
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http:\/\/www.cfa.harvard.edu\/iau\/cbat.html<\/p>\n

URSID METEORS 2007
P. Jenniskens, SETI Institute, reports on elevated Ursid shower rates
between Dec. 22d18h and 23d01h UT, identified as dust ejected from comet
8P\/Tuttle prior to 900 AD (cf. CBET 1159).\u00a0 The outburst was detected in
radio forward-scatter meteor observations by E. Lyytinen (Helsinki, Finland)
during Dec. 22d18h-23d01h and by J. Brower (Vancouver, BC, Canada) during
Dec. 22d18h.5-22d22h.5.\u00a0 I. Yrjola (Kuusankoski, Finland) reports that 25
Ursid meteors and 16 sporadic meteors were captured on video, with a peak at
around 21h15m, the Ursids being slightly brighter on average than other
meteors that night.
The International Meteor Organization gathered visual observations from
19 observers, who measured a peak ZHR = 34 \u00b1 5 Ursids\/hr (vs. predicted
40-70 meteors\/hr) at solar longitude 270.53 \u00b1 0.03 deg during Dec.
22d21h12m \u00b1 42m, based on 116 Ursids (assuming a fixed population index
of chi = 2.5).\u00a0 The predicted peak time was Dec. 22d20h-22d22h.2.<\/p>\n

NOTE: These ‘Central Bureau Electronic Telegrams’ are sometimes
superseded by text appearing later in the printed IAU Circulars.<\/p>\n

(C) Copyright 2007 CBAT<\/p>\n

2007 December 31\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (CBET 1188)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Daniel W. E. Green<\/p>\n

More to come…<\/p>\n","protected":false},"excerpt":{"rendered":"

The 2007 Ursid Multi-Instrument Aircraft Campaign \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 In late December Jenniskens headed the 2007 MAC Ursid campaign. The shower is produced by ejecta from Comet 8P\/Tuttle. The Ursids shower of 2007 were predicted to peak between 2000 to 22:12 UT which favoured European observers. Radio observation permitted me to observe … Continue reading “2007 12 22 Ursid Outbreak”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":319,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44],"tags":[],"class_list":["post-320","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-radio-results"],"_links":{"self":[{"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/posts\/320","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=320"}],"version-history":[{"count":0,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/posts\/320\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/media\/319"}],"wp:attachment":[{"href":"https:\/\/bcmeteors.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}