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What's causing this tracking issue?

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#1 EricJD

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Posted 23 March 2009 - 04:16 PM

Take a look:
Posted Image

I'm using PHD through a DSI pro on an LXD75. Most of my subs are just fine, about 25% of them have what appears to be a bump.

Anyone can tell me what exactly this is?

#2 David Pavlich

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Posted 23 March 2009 - 04:25 PM

Was it windy when you were imaging or is it possible that the scope/mount was bumped or jiggled?

David

#3 Mert

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Posted 23 March 2009 - 04:37 PM

Maybe if the setup wasn't on firm solid ground/concrete
and walking close by might produce this??
Just my 0.02€ :shrug:

#4 Joe Cipriano

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Posted 23 March 2009 - 05:16 PM

I've seen this when the AG's guide star shares the field with another fairly bright star - the AG can alternately lock onto either one, causing similar results. Perhaps try for a guide star in a less populated area of the sky.

I wouldn't rule out a bump, snagged cable, or wind, either...

#5 EricJD

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Posted 23 March 2009 - 05:39 PM

Thanks for the ideas guys, I'm actually thinking that the problem may have been what Joe said.

#6 Mert

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Posted 24 March 2009 - 02:33 PM

Have you ever tried Metaguide just to see if
it's worth to change? ( also Free SW )
For me it's great and ever since I'm not chasing
seeing effects anymore.






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