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(meteorobs) My first Leonid animations
>To: imo-news@yahoogroups.com, akm-mitglieder@egroups.com, leo2001@egroups.com
>Date: Tue, 4 Dec 2001 13:34:29 +0100 (MET)
Folks,
in 1999 I was somewhat disappointed by my video records of the Leonids storm.
I had choosen a small field of view with good limiting magnitude but recorded
just a few hundred Leonids. In fact, even during the storm Taurids and
other meteors made up about 20% of all detected meteors.
So this year I decided for the opposite choice. I operated AVIS with a
16mm f/2.8 fish-eye lens which gave me a 95 deg field of view and a
limiting magnitude of close to 5 mag. It turned out that this was a good
choice, especially since the percentage of bright meteors was much higher
than in 1999. A first run of the meteor detection software MetRec revealed
more than 2000 meteors, among them a number of fireballs, in 8 hours of
effective observing time. There are up to 20 recorded meteors per minute
which is about half of what I saw with my own eyes. Hence, the video gives
a good account of the visual impression of the storm.
The analysis will be refined in the following days, but to have already
something picturesque I created a first animation of the 2001 Leonid
storm last night. It covers the time 17:00-21:00 UT on November 18. Each
of the 240 image of the sequence was made of 1500 video frames, i.e.
one minute of recordings.
The animation is not yet perfect, but I guess it's a good start.
There are two versions available:
- half PAL resolution (388x284 pixel, 18 MB!!!)
http://www-i6.informatik.rwth-aachendot de/Colleagues/molau/leo01/leo01an1.gif
- quarter PAL resolution (192x144, pixel, 4.3 MB)
http://www-i6.informatik.rwth-aachendot de/Colleagues/molau/leo01/leo01an2.gif
I hope you enjoy it.
Cheers,
Sirko Molau
--
**************************************************************************
* Dipl.-Inform. Sirko Molau * *
* RWTH Aachen, Lehrstuhl fuer Informatik VI * __ *
* Ahornstr. 55, D-52056 Aachen, Germany * " 2B v 2B " *
* * *
* phone: +49-241-8021615 * Shakespeare *
* fax : +49-241-8022219 * *
* email: molau@informatik.rwth-aachendot de * *
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* www : http://www-i6.informatik.rwth-aachendot de/Colleagues/molau *
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