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Mon. Not. R. Astron. Soc. (2009) doi:10.1111/j.1365-2966.2008.14243.x The 2007 Aurigid meteor outburst
 

Summary: Mon. Not. R. Astron. Soc. (2009) doi:10.1111/j.1365-2966.2008.14243.x
The 2007 Aurigid meteor outburst
P. Atreya and A. A. Christou
Armagh Observatory, College Hill, Armagh BT61 9DG
Accepted 2008 November 12. Received 2008 November 7; in original form 2008 October 9
ABSTRACT
A rare outburst of the Aurigid meteor shower was predicted to occur on 2007 September 1 at
11:36 20 min UT due to Earth's encounter with the one-revolution dust trail of long-period
comet C/1911 N1 (Kiess). The outburst was predicted to last 1.5 h with peak zenithal hourly
rate of 200 h-1
, which is 20 times higher than the annual Aurigid shower. Three members
of Armagh Observatory observed this outburst from the general area of San Francisco, CA,
USA, where the shower was anticipated to be best seen. Observed radiant, velocity and activity
peak time were consistent with the predictions, whereas the zenithal hourly rate was about half
of the predicted value. Five Aurigids were observed by two stations simultaneously, enabling
their spatial trajectory to be worked out. The orbits of these double station meteors are in good
agreement with that of their parent comet Kiess. The outburst was abundant in bright (-2 to
+1 mag) meteors. The first high-altitude Aurigid, with a beginning height of 137.1 km, was
recorded.
Key words: meteors, meteoroids

  

Source: Armagh Observatory

 

Collections: Physics