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Phd2 keeps dropping star

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#1 damarks913

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Posted 15 January 2022 - 12:06 AM

Phd2 keeps dropping the guide star...possible solutions besides the obvious atmospheric issues?



#2 Jim Waters

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Posted 15 January 2022 - 12:12 AM

The guide star may be too dim.  Light pollution issues, clouds ...etc.  Post your log files.


Edited by Jim Waters, 15 January 2022 - 12:24 AM.


#3 DirtyRod

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Posted 15 January 2022 - 12:24 AM

Focus? Tried raising the gain? Tried 2X binning?


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#4 danny1976

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Posted 15 January 2022 - 06:02 AM

You can try multi-star guiding.



#5 michael8554

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Posted 15 January 2022 - 06:40 AM

Post your PHD2 GuideLog, from the PHD2 folder, check that the date in the filename is relevant

 

We have no idea what equipment you have, so if we're into guessing:

 

1) Using Star Mass detection ? Try Min HFD instead, set to 2 pixels.

 

2) The exposure may be too fast, 2 to 3 secs is common.

 

3) Uncorrected Dec Backlash

 

4) Poor Star Profile.




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