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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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