A lovely day and a clear evening however by midnight most of the dew on the scope has frozen to a thin layer of frost. I grabbed the OTA cover to find the multitude of water droplets had turned into a sheet of ice on the topside! I haven't experienced this much cold for a long time. Dew heaters are doing diddly.
Luckily in today's fine weather I spent the afternoon in the sunshine marking out the new observatory in the backyard!
