(meteorobs) Swift Sees 5th Magn. GRB!

[meteoreye at comcast.net]

Yes that is correct, but since the metors are distributed around the radiant in all directions, the lower the radiant is, the lower the majority of the meteors will be. Our camera only operated for the quadrantids till about 3AM LST due to an electrical problem. By that point the radiant had just reached ~ 30 degrees elevation (HR would be 50% of ZHR under =6.5 skies). Another limit is that we have the near horizon masked to avoid stars showing through the trees, which can lead to false detections.
By that time, the camera (looking at the whole sky) had detected 1 QUA, while Pierre and I (looking at a typical ~ 100 degree diameter FOV) had seen 7 and 6 respectiveley. Also the camera has a detection limit around +2.5, So perhaps it wasn't surprising, just diappointing.
Wayne

-------------- Original message -------------- 
From: Karl Antier <ka.antier at wanadoo.fr> 

> Hi all meteor observers, 
> 
> Just a small question relative to the discussion: 
> 
> > It did very bad detecting Quadrantids due to the low elevation resulting 
> > in slow angular velocity. 
> 
> I thought it was the elevation of the meteor above horizon which was a factor 
> limiting the apparent speed of meteors. Does radiant elevation also influence 
> their apparent speed ? Why ? 
> 
> Thanks in advance for your answers ! 
> Karl 
> 
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