For anyone considering this event.
You might like to read their Wiki site.
http://ltvt.wikispaces.com/Kaguya+Impact
On the one hand there may be no visible impact plume as the Suns rays will be 35km above the predicted impact site and they are thinking that 5kms height is probable height.
Also there may not be any visible flash unless you have a big telescope - basing it on an impact that they suggest was 10X smaller, however on the other hand they dont really know what is going to happen and you never know what you might get.
Remember Shoemaker Levy !
I'll be waiting for the next announcement just to make sure it doesn't impact on the Far side. Could be a cold night for nothing.
If anyone has more info I'd love to hear it.
Rally