Changing the primary guide star when in multi-star guide mode

[johncd...@gmail.com]

I apologize in advance if the answer to this question is somewhere in the doc but has elluded me... 

So when I'm in multi-star guiding mode and I click for PHD2 to autoselect - and it selects the primary guide star and supplementary guide stars... is there a way to get PHD2 to select a different primary guide star?

I've been imaging M101 for a few nights now - and the star that PHD2 selects has an awful profile compared to at least one other star in my OAG's field... Last night I was regularly getting "star lost" warnings - one or two in a row - then it would re-establish itself.  This problem went away when I manually selected another star in the field which had a beautiful bell-curve profile across the star disc.  

I'm starting to suspect that PHD2 is auto-selecting the core of the M101 galaxy as its primary star... the core is pretty compact and bright - but difuse...

At any rate - is there any way to run multi-star guiding and be able to manually select the primary guide star?

Thanks!

John D.

[Bruce Waddington]

Hi John.  There’s no way to change what primary star is used but that really shouldn’t be necessary.  I would like to see your debug log file so I can why it’s behaving as you describe.  This sort of thing can happen if you have a saturation value that isn't compatible with the bit depth of the camera data - i.e. a saturation level of 255 with a 16-bit camera interface.  Anyway, you should upload the log files using the Help/Upload Logs… feature in PHD2:

https://openphdguiding.org/getting-help/

Regards,

Bruce