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observing in the cold weather?

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observing in the cold weather?

Postby travisteacher on Thu Nov 20, 2008 7:45 pm

I'm a school teacher and my class and I are observing the night sky tomorrow night. The temp is going to be around 24 F. Not sure if we should still do it? We have a Celestron CPC Series 1100.

Please Advise,


Postby Jne_K on Fri Nov 21, 2008 7:06 am


You absolutely should observe tomorrow night. Some of the best sky conditions occur in winter. I have done plenty of observing in even sub-zero weather.

Some hints:
Dress as warm as you can. No such thing as overdressing for cold weather astronomy. Remember, this is not an aerobic activity. You will be standing around for the most part.

Bring a thermos with hot cocoa. The sugar will help your eyes stay at the best.

Cold weather will not hurt a telescope. The focuser may get sticky if you have grease in it. Other than that, only issue is battery drain if you are running a motorized scope. Bring extra batteries, just in case.

Be very careful handling eyepieces. Cold hands tend to drop things and in sub-zero weather touching metal should always be approached cautiously.

Be careful not to breathe on or near the eyepiece whn observing or it will fog, immediately.

Cover your telescope with a towel or tarp before bringing it back indoors. This will help with condensation issues.

Get out there and observe. Clear skies to you!
Thanks for posting with us
Joanie K - Your personal optics expert


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