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RE: (meteorobs) David Swain Oct 14/15



Very interesting, David. Thanx for quoting the information you used, and 
the source. This will allow me to do a little checking. As far as I know, 
the AND's are not on the current visual shower list of the IMO, so I'll 
check and get back to you when I find out what the story is. Glad to see 
that you manage to find any clear skies at all to observe, considering the 
horrible stories we hear in America!.

I'll be in touch soon, and again, thanx for the info.

Wayne in NEW Jersey

----------
From: 	David M. Swain[SMTP:David.M.Swain@telinco.codot uk]
Sent: 	Thursday, October 21, 1999 2:27 PM
To: 	'meteorobs@jovian.com'
Subject: 	RE: (meteorobs) David Swain Oct 14/15

Wayne

Thanks for your comment about the meteor path length, you are right it is a 
misconception that I held, don't know where it came from but I held it 
anyway, now it's gone. I also take your point about too long meteor paths, 
I'll have to bear both of these points in mind.

As to the radiant I am using for the Andromedids it comes from the Guide 7 
star charting program which has a data set included titles IMO radiants, 
the data for this particular radiant is as follows:

Radiant of Meteor Shower
Andromedids Annual
IMO (International Meteor Organization) acronym: AND
Activity from 25/09 to 12/11
Maximum date: 03/10
Solar longitude: 190.70
Right Ascension (RA) 20.0 degrees on maximum date
Declination (Dec) 34.0 degrees on maximum date
Daily motion in RA: 0.38 degrees
Daily motion in declination: 0.66 degrees
  (The above motion data reflects the fact that,  during the time
  of activity,  the radiant will usually appear to drift a little.)
Geocentric speed of incoming meteors: 18.2 km/second
Remarks: Very slow

So as you can see it has a quoted maximum of 3rd October, very slow meteors 
and the meteors I saw matched this speed quite well as they were sloow. If 
this is not a valid radiant can you please let me know as I will ignore it 
in future. I don't think it is intimately related to the Beilids (although 
it might be) as I think they are at maximum in the middle of November and 
also they have virtually no activity outside their storm periods.

Hope this helps

David


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