(meteorobs) Observation 27-28 July 2004

[Geert Barentsen]

Hello Lew,

The radiant doesn't get higher than 20°/25° here, and the limiting 
magnitude is pretty bad (5.2 to 5.7 in zenith)... This makes the total ZHR 
correction factor easily bigger than 10, so you could consider my 3 SDA's 
to be pretty impressive ;-)  Of course, it doesn't make sense to derive a 
ZHR from a single observation, but I think the big correction factor 
indicates that one should not derive too many conclusions from 
high-latitude aquarid observations...

Moreover, I find it very-very-very hard to perform a perfect radiant 
association, because it requires very-very-very accurate plots... It is 
easy to detect a Capricornid because of it's brightness and slow speed, but 
meteors from the aquarid-radiants or antihelion-source all seem to have 
similar speeds (and are usually rather dim).
In the weeks around the Perseid maximum, I report possible aquarid members 
as "Diverse", because I do not feel able to perform a decent shower 
association without plotting. I'd love to hear the opinion of other 
meteorobs-members about this?? (Related question: do you follow the IMO 
shower list during the Perseid maximum, or do you use "Perseid / 
Non-Perseid"? I could personally do well without the latter option in 
recent years.)

The third issue of WGN arrived in my mailbox this morning, and contained 
two articles about the Aquarid-Capricornid complex!  Rainer Arlt and 
Audrius Dubietis analysed this complex based on visual observations between 
1997 and 2002. They obtained nice results! A very interesting read!! There 
is also an article by Robert about the antihelion source.

Greetings,
Geert




At 20:26 29-7-2004, you wrote:
>Wow, Daniel, Geert, Van - none of you saw significant
>activity from the SDAs! Were they just unusually weak
>this year? Or perhaps observers from lower latitudes
>(Daniel was at 49N, Geert and Van way up at 51N!) saw
>some higher numbers from this more southerly shower?
>
>Did anyone below, say, latitude 35N record some more
>interesting SDA activity during the peak period?
>
>Clear skies!
>Lew
>
>
> > -----Original Message-----
> >Observer: Daniel GRUEN   IMO code: GRUDA
> >| Period....|Field....|Teff|.F..|.lm.|CAP|ACG|ANT|SIA|NDA|SDA|PER|SPO|SPO|
> >|..(UT).....|RA...Dec.|..h.|....|.m..|M|N|M|N|M|N|M|N|M|N|M|N|M|N|M|N|M|N|
> >|----------------------------------------------------------------------*-|
> >|23:15-00:00|336d|+50d|0.70|1.00|5.50|P|-|P|-|P|-|P|1|P|-|P|1|P|-|P|2|C|-|
> >|00:20-01:00|296d|+45d|0.57|1.00|5.70|P|-|P|2|P|1|P|-|P|-|P|1|P|1|P|3|C|2|
>
>
> > -----Original Message-----
> > Observer: Barentsen Geert       IMO code: barge
> > Period   |RA |Dec| Teff|  F | lm |  per|  nda|  sda|  sia|  cap| spor
> > 2339-0053|345| 30|1.133|1.00|5.51|p,  3|p,  0|p,  3|p,  0|p,  1|p, 10
> > 0053-0200|  0| 30|1.100|1.00|5.17|p,  4|p,  0|p,  0|p,  1|p,  0|p,  4
> >
> > Observer: Van Gorp Koen       IMO code: vanke
> > Period   |RA |Dec| Teff|  F | lm |  per|  nda|  sda|  sia|  cap| spor
> > 2346-0053|310| 45|1.017|1.00|5.58|p,  3|p,  0|p,  0|p,  0|p,  1|p,  9
> > 0053-0200|340| 45|1.117|1.00|5.32|p,  4|p,  0|p,  0|p,  0|p,  0|p,  5
>
>
>
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