Randy, you're attached photo is exactly like what I saw. If your planetarium photos don't show that star, could it be a supernova in M108 or a faint nova from our galaxy superimposed on NGC 3556? In either case, could we be missing out on a minor astronomical discovery?
At an Eagle Bluff star party in 2006 members of the RAC spotted a nova in M51 that had been discovered by an amatuer astronomer in Germany just eight days previous.
I'll look at it again tonight, hopefully it is still there.
I need nine more Herschel 400's to pass the 300 mark. No bartending on a clear night. What a blessing!