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Re: (meteorobs) Re: NM past South Delta Aquarid rates

    If I saw too few SDA's on the 25/26th this year, that can almost certainly
be chalked up to my inexperience!  I have caught myself too many times this
year not paying attention to the possible radiant origins of meteors I spot.
And I've offered the disclaimer several times that I probably have too many
sporadics and not enough shower members listed in my reports.  On the other
hand, I am very careful about the ones I do ascribe as shower members -- I note
shower velocities and arc length as related to the distance from radiant.
     Norman's list of past rates is very informative!  It leads me to ask one
question...do the SDA's have a dependable rate year to year?
     Not straying too far from the subject, I have a couple of other lingering
questions about velocities.
           A.   Is is possible to see different but close velocities from the
same shower.  For instance, could I designate one leonid as a 5 and another as
a 4?  Would this difference be subjective or due to perspective?
           B.  When meteors have extremely short path lengths, I find it quite
difficult to give many of them what I feel would be accurate velocity ratings.
Should I take Lew's advice and just "call 'em as I see 'em" (as best I can)?
                      Thanks up front,             Kim Youmans

nmcleod@peganet.com wrote:

> Here are abbreviated reports from several past Julys, restricted to hourly
> South Delta Aquarid rates and seen in mostly LM7.0 skies from latitudes 25N
> to 28N.  Times are in local daylight hours.
>
> 1971
> July 26/27, hours 1-5 ; South Deltas 3,4,6,6
> July 29/30, hours 2-5 ; South Deltas 10,14,9
>
> 1973
> July 25/26, hours 11-3 ; 7,3,4,2,3
> July 26/27, hours 11-12 ; 1
> July 27/28, hours 3-5 ; 4,6
> July 28/29, hours 1-5 ; 5,3,5,3
> July 29/30, hours 12-5 ; 5,7,4,6,12
> July 30/31, hours 1-5 ; 10,6,7,5
> July 31/1, hours 12-5 ; 7,5,12,10,7
> Aug 1/2, hours 12-5 ; 2,7,6,5,1
> Aug 2/3, hours 1-3 ; 8,7
> Aug 3/4, hours 1-3 ; 5,18
>
> 1974
> July 25/26, hours 12-2 ; 1,2
> July 25/26, hours 4-5 ; 1
> July 26/27, hours 2-5 ; 6,3,4
> July 27/28, hours 1-5 ; 5,8,6,14
> July 28/29, hours 2-4 ; 4,13
>
> 1976
> July 25/26, hours 11-5 ; 1,2,4,6,6,9
> July 26/27, hours 10-11 ; 0
> July 26/27, hours 2-5 ; 8,11,7
> July 27/28, hours 10-5 ; 0,2,2,6,11,16,10
> July 28/29, hours 10-5 ; 0,0,10,12,11,10,9
> July 29/30, hours 10-5 ; 1,3,6,18,24,16,9
> July 30/31, hours 10-3 ; 1,2,15,15,9
> July 31/1, hours 9-5 ; 1,0,3,5,11,9,13,7
>
> 1981
> July 27/28, hours 11-12 ; 3
> July 27/28, hours 1-4 ; 6,6,4
> July 28/29, hours 11-4 ; 0,6,10,6,11
> July 29/30, hours 10-5 ; 3,7,6,9,22,16,16
> July 30/31, hours 12-5 ; 4,5,10,10,3
> July 31/1, hours 10-2 ; 2,1,0,8
> Aug 2/3, hours 2-5 ; 5,6,4
>
> 1984
> July 25/26, hours 1-4 ; 7,4,6
> July 27/28, hours 2-3 ; 3
> July 28/29, hours 12-5 ; 3,9,7,6,3
> July 29/30, hours 3-4 ; 16
>
> On which night does maximum occur?
>
> Norman
>
> Norman W. McLeod III
> Asst Visual Program Coordinator
> American Meteor Society
>
> Fort Myers, Florida
> nmcleod@peganet.com
>
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