Constellation class

The Constellation-class cruiser was in Starfleet service from the late 23rd century through the mid-24th century.

Specifications
A notable feature of the Constellation class was that it was one of the few classes in use mounted with four nacelles.

Alternate timelines
In one timeline, the prototype vessel was launched in 2299 and disappeared into a wormhole during trials. The starcruisers took its place as front-line exploration vessels. ()