(meteorobs) Draconids past returns

[Bias, Peter V]

Karl,

In Peter Jennisken's book "Meteor Showers and their Parent Comets", pages 676 - 679, he lists the ZHRs as:
1933 - 10,000
1946 - 12,000
1952 - ~ 250
1985 - 150 +/- 50
1992 - no listing
1998 - 300 +/- 40 for one stream ("older trails?"), and 500 +/- 100 for a second encounter (1926 trail) these two trails meet earth about an hour apart
2005 - no listing
His data are culled from other sources as well as his own modeling.

In addition, he lists several trail encounters in 2011 and one in 2012 (most closer than 0.06 AU), but doesn't list any projected ZHRs.
Hope this helps. 

     Pete Bias
________________________________________
From: meteorobs-bounces at meteorobs.org [meteorobs-bounces at meteorobs.org] On Behalf Of Karl Antier [karl.antier at laposte.net]
Sent: Monday, August 15, 2011 10:57 AM
To: meteorobs at meteorobs.org
Subject: (meteorobs) Draconids past returns

Hi all meteor observers,

I was trying to make a summary of the past observed outbursts of the Draconid meteor shower, but depending on the sources and the observing methods, results seem to vary a lot...
Actually, I managed to define 7 returns of the shower from 1900 until today. can someone confirm or precise my set of data ? I used, for that, different sources:
- Meteorshowersonline of Gary Kronk, (http://meteorshowersonline.com/october_radiants.html),
- IMO notes and circulars,
- Grandi Fenomeni Celesti, (Gabriele Vanin)
- other references found on different places on the web.

Here are the results :

1933 --> 5 000 – 10 000
1946 --> ~ 10 000
1952 --> ~ 200 (radio)
1985 --> ~ 700 (radar)
1992 --> ~ 500 (radio)
1998 --> 500 (visuel)
2005 --> 35 (visuel) – 150 (radar)

Thanks in advance for your help!
Clear skies,
Karl










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