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Old 23-09-2011, 09:18 AM
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hotspur (Chris)
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Join Date: Apr 2009
Location: south east QLD,Australia
Posts: 2,869
re guiding.

Finally got some guiding going last night!

Tried 253,but the speed setting on controller had switched to 3.5 AG speed.So that threw things for first few images.By the time I got it sorted,the object was almost over head.Did not really do any good.

Went to M45,nice angle in sky,had a fiddle -

the Cal step was set to 1400

min mot .05 RA agres 60%

and I de focused guide stars a bit,It was getting late,the seeing
had much improved.First couple of images a bit eggy,but as time went on
and it all settled down.Starting getting nice round stars even when cropped right in. Was doing 3m 30 sec exp.and ended up with around 12 good images,I took 4 darks along the way-I could even PP this data-and will attempt in DSS.

The RMS value was showing .15.I was told this value is important to monitor,in good seeing another astronmer is getting .09 with this sort of set up.

The graph started to look less 'saw tooth'. Not sure what the main reason was that it all started to work.But my thoughts are de focusing guide star,the improvement in seeing conditions,followedby setting changed to 1400.

I'll post some images and crops of centre area.

Thanks for all the help and pointers everyone-Chris
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