Normally here in Walcha (alt 1087, at my house) we can get frost as early as 9pm, i know i had my 8" set up last wednesday night and i took 1 x 1-hr exposure at around 8pm and then my toes froze, the birdbath usually turns to ice and my scope covered in a light frost.....thats normally between 9 and 10pm, this morning we had -6...
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