Monday, September 26, 2022

A bit of clear skies and discovery of astigmatism

 


Figures!!!  I got to have a nice string of clear and mostly steady skies only to discover that my mirrors are astigmatic.  Thanks to my good friend Mitch D, and some of the folks on Cloudy Nights - https://www.cloudynights.com/topic/842366-defocused-star-test-questions I discovered my scope is under performing.  I am hoping to understand more of this issue but for now I'm somewhat convinced that it is really stemming from running only 2 of 3 TEC Peltier coolers and or OVER cooling it, especially unevenly.   Until I can get a handle on it, it appears I'm not getting very clear images no matter the focus or seeing.


Previous seasons - https://astromaphilli14.blogspot.com/p/jupiter-all-mikes-active-years.html

Rest of this seasons’ albums will be placed here:

 

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