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RE: (meteorobs) Linearids observed!



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From: 	birger.andresen@fesil.no[SMTP:birger.andresen@fesil.no]
Sent: 	Saturday, November 13, 1999 6:59 AM
To: 	meteorobs@jovian.com
Subject: 	Re: (meteorobs) Linearids observed!


The below is one reason that when I am plotting meteors, I make an effort 
to not know where the radiants are located on the night (or most times, 
morning) in question. This has led to a number of Perseid like meteors 
being rejected as Perseids since they were on the wrong side of, 
ironically, Cassiopeia. By not knowing the radiant location, at least my 
plot (of unknown accuracy) is not influenced by previous knowledge of the 
position.

Wayne


One more thing: Assume that say 20 fairly experienced meteor observers were
"brain washed" to believe that the Perseid radiant was in the middle of
Cassiopeia, and that these people were asked to plot meteors during the
perseids. My guess is that they would generally plot mostly Cassiopeids for 
a
long while provided the center of their field of view was sufficiently far 
away
from the real radiant (several meteors between the real radiant and the 
wrong
one would of course tell them that something was wrong). I'll bet they 
would be
inclined to twist the trajectory a bit to fit with the expected radiant. I 
doubt
they would even suspect that they did this for a long time. I am not saying 
that
this is the case for your Linearid, but you should be pretty sure about the
trajectory to rule out this possibility.

   Birger Andresen


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