(meteorobs) meteoroid orbit vs parent body (comet)

[chiayk]

Hartwig Lüthen wrote:
> Hi
> In fact we got a number of orbits which were quite consistent with 
> published values for node, arg of perihelon, inclination and q. 
> Excentricty varied in these orbits quite a bit, but I think that's 
> normal for stream meteors. On the other hand, we had a number of 
> orbits that were far off. The geocentric parameters (altitude of first 
> detection, final altitude) looked however quite reasonable throughout 
> our data. 
Hi Hartwig:

    Many thanks for the input - that is exactly what i am looking for..

    If " ..the other orbits that were far off " were from short # of 
frames then as you said the velocity error is large otherwise could it 
be now the limitation of  2-D criteria of shower association (backward 
propagation, angular velocity, path length) and only 3D information ( 
via 2-station)  reveal the true members vs chance 2-D alignment?
  
   Then a longer focal length result eg 25mm might yield better velocity 
estimate. ( now meteor appears over more frames etc).

   p/s Watec 902H - no integration capability

rgds
ykchia