(meteorobs) [IMO-Network] Draconid radiant position?

[Bernd Brinkmann]

Hello,

here are my radiant positions calculated with RADFIND with the same parameters as 
given by Sirko below:

KLEMOI: 
pos= 261.5 /  55.5 +/- 1.1  vel= 20.0 +/- 0.6

HERMINE:
pos= 261.5 /  55.5 +/- 1.3  vel= 21.0 +/- 0.8

So for me there is no shift in right ascension. Perhaps an clock error?

Clear skies
Bernd

 
> upon analysing my Draconid observations I found a significant shift 
> between the expected and observed radiant position. The expected 
> position (according to the IMO Meteor Shower Calendar 2011) is
> 
> alpha = 262°, delta = 54°, v_inf = 20km/s
> 
> However, the radiant I get from 200 Draconids, recorded by AVIS2 between 
> 18:15 and 21:15 UT, is
> 
> alpha = 277°, delta = 54°, v_inf = 20 km/s
> 
> That is, the deviation is exactly one hour in right ascension. Can that 
> be confirmed by other video observers?
> 
> Best,
> Sirko
> 
> PS: I determined the radiant position with the radfind tool
> (radfind -sol 194 196 -iter -posdat -stepp 0.5 -stepv 1 -alpha 250 300 
> -delta 30 60 1008DATA.DBF dra.out)
Bernd Brinkmann

Sternwarte Herne, MPC code A18
Herne, Germany

e-mail: info at sternwarte-herne.de
http://www.sternwarte-herne.de