[Cimitar (Evan)]

Hi,

Question from a viewer - is drift more noticeable in different parts of the sky?

The reason I ask is that I was out taking images 2 nights ago. I ran a 10min sub (my first ever!) on the Sculptor Galaxy and Helix Nebula, both of which worked perfectly. The time was around 1.30am and both DSO's were near the meridian (slightly to the West).

However when I went to the Horsehead and NGC 1365, both of which were in the East and away from the Meridian, neither of these worked and I got quite a bit of drift. PHD had a great deal of difficulty keeping up (I ended up with eggy stars or lots of L shapes on my stars). There was no wind during the night, it was dead still.

PS. The L shapes also lead me to a follow-up question - when the L shape occurs, why doesn't it happen to all stars in the image?

Thanks in advance!
Evan