USS Scovil

From Memory Alpha, the free Star Trek reference.

The USS Scovil (NCC-1598) was a Federation starship in service during the late 23rd century.

The Scovil was among the starships that would have been assembled for the aborted assault code-named Operation Retrieve, which was to have rescued Captain James Kirk and Doctor Leonard McCoy from Qo'noS in 2293.

The Scovil was undertaking astronomical research according to a mission assignment display on the USS Enterprise's bridge. (Star Trek VI: The Undiscovered Country)

The Scovil was named for Charles Scovil, an American astronomer. The icon representing the Scovil on the barely-visible chart in the Federation President's office was a Constitution-class starship, according to Michael Okuda, and is listed as such in the Star Trek Encyclopedia. However, all ships on that chart save the USS Excelsior had the same icon, so it is very unlikely that the Scovil's class can be determined.