Guide star lost, low mass or low SNR

[Chuck Schreiner]

I am not sure if this was because full moon (bright sky), poor focus, poor polar alignment or something else. Here's the log: https://openphdguiding.org/logs/dl/PHD2_logs_Hxez.zip

Thanks a lot. 

[bw_m...@earthlink.net]

There’s really no way for us to know, we can’t picture your sky conditions.  It certainly has nothing to do with polar alignment, it never does.  When you have this kind of problem, use the File/Save menu item in PHD2 to save a typical guider image.  Then open that image with an imaging or image processing app and see what it looks like – no stars, bloated fuzzy stars, whatever.  Don’t apply a stretch to the image, look at the full range of pixel values because that’s what PHD2 does.  You’re using a color camera here so you already have a bit of a disadvantage relative to a mono camera.  If you’ve changed the camera gain since building the dark library, you should rebuild the darks.

 

Regards,

Bruce

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[Chuck Schreiner]

Thanks, Bruce