Centaur
The classification of the USS Centaur is unknown.  The ship is mainly a rearrangement of Excelsior-class components and was possibly introduced in the early 24th century.  It has a weapons or deflector pod similar to the Miranda (but larger) at the bottom of the saucer between the warp engines.

Little is known of the Centaur because it is a kitbashed type ship.  Made from random starship parts in order to make a Starship fast for the Dominion War.