[BAA-ebulletin 00620] DRACONID METEOR OUTBURST OBSERVED

[BAA electronic bulletins service]

DRACONID METEOR OUTBURST OBSERVED

Observations by BAA members and by non-members who have so far communicated 
with the Director of the Meteor Section confirm that a short-lived outburst 
of Draconid meteors occurred on 2011 October 8.

Draconid rates were generally low until around 1900 UT on October 8 when a 
rapid increase in activity occurred, peaking between 2005 and 2015 UT. 
Thereafter there was a rapid decline, with Draconid meteor rates returning 
to a low level by 2130 UT.  A very preliminary analysis of visual 
observations made by a group of observers led by the Director, observing 
from near Goreme in central Turkey, indicates that the peak equivalent ZHR 
was about 350 m/h between 2005 and 2015 UT, although correction factors are 
high due to the effect of bright moonlight.  It is possible that lesser, 
short-lived secondary bursts in Draconid activity were also noted around 
1915 and 1938 UT.

Observers in the UK had to contend with cloud and rain on the evening of 
October 8, but it is extremely encouraging that so many individuals and 
local society groups battled the elements in the hope of getting a view of 
the shower.  Some were rewarded for their persistence.  A short period of 
partially clear weather enabled observers in Dorset, Wiltshire, Oxfordshire, 
Gloucestershire and Berkshire (and hopefully other areas as well) to glimpse 
the shower between 1955 and 2030 UT.  By a fortunate circumstance this was 
coincident with the main peak in Draconid activity.

The Director is extremely grateful to all those observers in the UK who have 
so far communicated with him by email, including: Len Entwisle, Peter Gill 
(Eastbourne AS), Gerard Gilligan (Liverpool AS), Tim Haymes (Maidenhead AS), 
Brian Heath (Nottingham AS), Nick James, Gordon MacLeod, Bob Mizon, Alex 
Pratt, George Spalding and David Swain.

More observations of the Draconid outburst, using photographic, visual, and 
radio techniques, from individuals and groups in the UK and overseas, are 
urgently required to build up a full picture of the shower's rapidly 
changing activity.  Even if you have only glimpsed a few meteors during a 
short-lived break in the clouds, the Section would like to receive your 
report. Simple counts of meteors seen within given time periods will also be 
welcome. It is intended that a summary of all the observations received, 
crediting all of the individual observers and society groups, will be 
published in the BAA Journal as soon as all observations have been received 
and the analysis completed.

There must be many observers - including many non BAA members - who 
witnessed the peak of the shower, and we would like to encourage all these 
people to submit their observations to the Section, either via email to: 
meteor at britastro.org

or by post to:

Draconid Meteor Project 2011
British Astronomical Association
Burlington House
Piccadilly
London W1J 0DU


This e-bulletin issued by:
John W. Mason, Director, BAA Meteor Section
2011 October 11