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(meteorobs) Fwd: Leonids in Belgium
Paul inadvertently sent this to my private address, and I am only now
finding it in my personal inbox: Apologies for the late forward, Paul!
Lew Gramer
>From: "Paul Roggemans" <paul.roggemans@nbbdot be>
>To: <lewkaren@tiacdot net>
>Subject: Leonids in Belgium
>Date: Thu, 18 Nov 1999 13:18:55 +0100
>
>Hello,
>
>Dispersed clouds, light polluted sky and despite this, Leonid rates
>attracked
>the attention. When the sky became better, even under poor circumstances the
>rates were impressive. At Nov 18, 2h02m I decided to count to get an idea
>how long it would take to see 100 meteors. Activity was distinctly at its
>best level between 2h02m and 2h19m. Here my results:
>
>Location: Belgium/Mechelen
>L= 4°28' E, 51°00' N
>
>Nov. 18 02h02h UT-02h19m Cloud cover 20%, LM= 5.0 99 Leonids 1 sporadic
>Nov. 18 02h20m 03h00m Cloud cover 30%, LM= 4.7 90 Leonids 2 sporadics
>
>The weather circumstances did not allow to determine a very valid LM. The
>clearest parts of the sky allowed to determine the LM but this varied due to
>thin illuminated clouds that occurred throughout the sky. No fixed LM valid
>for the observing period could be determined with reliable accuracy, The
>averall LM determined, mentioned above is an averaged of estimates made and
>may tend to be biased towards the LM of the best parts of the sky.
>
>My pure subjective impression of the shower intensity was to see a 'replay'
>of the 1993 Perseids at their best (Southern France at perfect sky
>conditions, lm 2 magnitudes better and no light pollution, no cloud). Now
>Leonids left me with the same impression but this time under poor city
>circumstances! The real rate under perfect sky may have been 10x better.
>Despite a fair
>number of bright Leonids seen, real spectacular fireballs remained totally
>absent (the Perseids had several of these). The rates depended strongly upon
>the fainter Leonids visible in the better transparent parts of the sky. I
>was sure the observers under dark sky conditions must have been watching a
>spectacular intense activity, but by no means a meteor storm such as the
>Leonids produced in 1966.
>
>Paul Roggemans
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