How about the moon?

It's in the camera and I just found out that there's to be a lunar eclsipse tonight. It might be too slow...but if I use a long shutter speed..1/2 to 1 sec??? I'm using a 500mm mirror at f8, I believe...

I'm planning to blow through the 50 and then load HP5...whadaya think about 3200???

Ideas? Fool's folly?