Re: USS Copernicus, NCC-640 or 623?
Indeed. I'd like to start believing in "USS Tsiolkovsky, NCC-640" from now on...
And I'd like to start believing that as well. Unfortunately it doesn't change the fact that because of the original disconnect between the Art Department (Okuda, who presumably created the plaque thinking the Tsiolkovsky was going to be a new ship) and the VFX department (who used the Grissom/Copernicus model and re-registered it according to what a 23rd century ship of that class would have logically been labeled), most future Oberths seen in TNG now sported 5XXXX registries and were essentially in continuous production for at least 80 years, when that was not the original intention.
“Don’t believe everything you read on the internet.”
– Benjamin Franklin