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large RA drift rate

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#1 menards

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Posted 18 June 2025 - 10:54 AM

Hello,
I have a large RA drift rate ( 106.51''/mn), guiding with ASIAR plus .
Do you know the origin and the way to correct it?

Attached screen copy

Thank you

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  • log_Phd2_070525.JPG


#2 menards

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Posted 18 June 2025 - 10:57 AM

added the PHD2 debug log

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#3 Tapio

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Posted 18 June 2025 - 12:36 PM

How good is your polar alignment?
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#4 michael8554

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Posted 19 June 2025 - 04:06 AM

I've seen this situation before recently (maybe it was you ?).

 

PA is fine, which would only affect Dec.

 

The RA guiding trend is flat, showing RMS 0.5 to 0.6arcsecs,

 

But offset 2.5arcsec up from the axis.

 

And continuous RA correction pulses do not bring RA back to the axis.

 

I suspect this is an ASIAir bug.



#5 menards

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Posted 20 June 2025 - 02:36 AM

Polar alignment error is about 5'




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