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Possible Bootid Meteor Outburst - June 13-14th

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Author Topic: Possible Bootid Meteor Outburst - June 13-14th  (Read 214 times)
martinastro
Martin Mc Kenna
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« on: June 20, 2010, 04:21:29 pm »

We could see some June Bo÷tid activity for the first time since 2004, as four 19th-century dust trails from the meteoroid stream are predicted to encounter the Earth on June 23-24. These were laid down by the shower's parent comet, 7P/Pons-Winnecke, at its perihelion returns of 1836, 1830, 1825 and 1819, and are expected to produce whatever activity they may around 22:40 UT on June 23 and near 00:07, 01:22 and 03:53 UT respectively on June 24. Zenithal Hourly Rates (ZHRs) are uncertain, but may be possibly similar to those seen in 2004, which were ~20-50.

The Moon is at first quarter on June 19, and full on the 26th, which, with the perpetual twilight for UK observers, will make conditions unhelpfully poor. However, checking for whatever takes place is very important this summer, especially as most of the maximum timings fall perfectly for overnight British coverage. Past June Bo÷tid returns, including that with ZHRs of ~50-100 in 1998, the first strong return since 1927, were readily seen from Britain despite the twilight, so if skies are clear, face towards as much darker sky as you can, avoid having the Moon in your view, and hope for the best!

June Bo÷tids are very slow meteors, so should be quite unmistakable, likely emanating from a diffuse radiant in northern Bo÷tes centred at RA 14h56m, Dec +48░, an area well on-view throughout the short nights. Note though that new International Meteor Organization (IMO) video results have suggested some very weak annual Bo÷tid activity has occurred in most recent years, at a level too low to be detected by visual watchers, from a radiant centred notably south of the expected one, near RA 14h24m, Dec +38░ on June 23. A few June Bo÷tids could be seen at other times between June 22 and July 2, but remember, there are no guarantees any activity will definitely occur at all. We can but watch and hope. Credit: Alastair McBeath, Meteor Director, Society for Popular Astronomy.
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Big Dipper
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« Reply #1 on: June 22, 2010, 01:42:19 am »

June Bo÷tids are very slow meteors, ........
Presumably that would account for the difference between the predicted date of the actual outburst (June 13-14 per this thread's title) and the date we get to observe them (given as June 23-24 in Alastair McBeath's narrative).

Sorry - couldn't resist!

Seriously though, thanks for the 'heads up' Martin.
« Last Edit: June 22, 2010, 01:44:33 am by Big Dipper » Report Spam   Logged

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Andy
martinastro
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« Reply #2 on: June 22, 2010, 06:46:11 pm »

Lol - very good Andy and well spotted!.  Smiley

Hope we get clear skies for the outburst, observed a borderline Bootid fireball two nights ago with orange fragments falling from it, quite a beauty it was too.
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