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I'm in a semi unique situation to most Roll Off Roof type Obs
and Fibreglass shell type Obs.
Mine is made of foam, so unfortunately it works just like an
esky. It takes a while to cool down. I help it along
with a few brute force fans as Sheeny suggests.
Usually, if the night is looking good the doors will be off the Obs
several hours before the session anyway.
In summer it's usually a double edged sword...insulates well from
the heat of the day but takes longer to cool if the temp drops
after sunset.
I have only really noticed any dome temp probs when imaging in all
seriousness during high F.L. imaging of planets. And that has
only ever been during winter months anyway for Mars apparitions.
2003-Jul-Sept, 2005 Sept-Oct etc.
I found having a coffee or monitor on in the dome while doing that
actually affected the scope performance more than any dome type
temp differential.
Without fully understanding the theory myself, I'd guess that probably
the worst thing you may want to do is in fact insulate an observatory.
Keep the ambient cool down time to a minimum?
FWIW.
Steve
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