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(meteorobs) Draconid data MISKO/more ZHR results
Hello,
Below the Draconid data from Koen Miskotte (MISKO) who observed from his
home in Ermelo, the Netherlands:
obs.: Koen Miskotte MISKO
loc.: Ermelo, the Netherlands, 52d 18'N, 5d 37'E
date: October 8, 1998
UT Teff Lm Dra Spo
18:06-18:26 0.33 5.5 2 2 50% cloud cover
18:46-19:16 0.50 6.1 2 4 no clouds
+2 +3 +4 +5
Draconids 1 0 2 1
Sporadics 0 4 2 0
From data gathered by Marc de Lignie and me (Lattrop), Jaap van 't Leven
(Bosschenhoofd) and Koen's data above (excluding the period with partial
cloud cover) and using an assumed r-value of 3.5 because of the weak
meteor magnitudes, I get a preliminary ZHR of 8 +- 2 for the period
18-20h UT. For each observer individual ZHR-values are:
Koen: 6 +- 5
Jaap: 9 +- 4
Marc: 6 +- 3
Marco: 10 +- 4
Average: 8 +- 2
This corresponds very well to the data reported by Arlt c.s. (Berlin,
Germany) and Stomeo (Italy).
Presumably, this activity represents part of a low level background
structure
behind the main peak observed from Asia. Such a background was also
present in 1985 (see P. Jenniskens, Astron. Astroph. 295 (1995), 206-235).
Even though we missed the spectacular display seen by our Asian
collegues, we still feel very satisfied to have seen the Draconid stream
displaying unequivocal activity, which is after all a very rare occasion!
Also, only half a day earlier weather prospects looked very dim, so we
are glad to have experienced a short period of clear sky (and Draconid
activity!) at all. So we are really very happy at the moment!
Cheers!
-Marco Langbroek
Dutch Meteor Society, the Netherlands
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