(meteorobs) Re: [IMO-News] IMO Shower Circ.: Draconids 2005
Christian Steyaert
steyaert at vvs.be
Fri Oct 14 04:27:10 EDT 2005
>The activity was also observed by radar technique with highest rates at a
solar longitude of 195.44 (2005 October 8, 17h UT).
Also seen in the observations of Dave Swan at:
http://radio.data.free.fr/main.php3
Why hardly seen in the results of several other forward scatter observers?
Geometry is the answer. The radiant has a high elevation around that time
for the European observers, an unfavourable condition.
Chris
At 10:04 14/10/2005 +0200, Rainer Arlt wrote:
> -------------------------------------
> I M O S h o w e r C i r c u l a r
> -------------------------------------
>
> DRACONIDS 2005, visual
>
>An outburst of Draconid activity was observed from
>Asian and eastern European geographical longitudes
>on October 8, 2005. The activity was also observed
>by radar technique with highest rates at a solar
>longitude of 195.44 (2005 October 8, 17h UT). With
>a population index of r=3.0, an equivalent ZHR near
>150 was derived (Campbell-Brown et al., Univ. of
>Western Ontario). Visual rates may be lower due to
>the different range of larger masses causing visual
>meteors.
>
>-----------------------------------------------
>Date (Oct) Solarlong nINT nGIA ZHR +-
>-----------------------------------------------
>06 19:20 193.5640 4 2 2.0 1.1
>07 16:00 194.4114 2 2 4.1 2.4
>07 18:50 194.5291 5 4 2.5 1.1
>08 14:10 195.3250 2 7 19.5 6.9
>08 16:10 195.4026 6 18 34.3 7.9
>08 18:30 195.5016 10 49 15.3 2.2
>08 19:50 195.5589 8 8 4.0 1.3
>08 21:50 195.6417 8 7 3.7 1.3
>09 07:10 196.0252 4 2 2.6 1.5
>-----------------------------------------------
>
>Solar longitudes refer to equinox J2000.0. ZHRs were
>computed with a population index of 3.0 in accordance
>with the radar ZHRs. No personal perception coefficients
>and no additional zenith correction apart from sin(hR)
>are applied.
...
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