Constellation class
The Constellation-class starship was a type of Federation star cruiser employed by Starfleet from the late 23rd century through the late 24th century.

History 
The Constellation-class began service as early as 2285, when at least one such ship, the , was constructed by Yoyodyne Propulsion Systems at the Copernicus Ship Yards on Luna. (USS Hathaway dedication plaque) 

Nearly a decade after the launch of the Hathaway, the prototype for the class, the , was still undergoing certification trials. ( Operation Retrieve chart)

Four decades later, Starfleet continued to launch new ship's of this class, including the . ( commemorative plaque)

During the early-to-mid 24th century, the Constellation-class was noted for performing both deep-space exploration and defensive-patrol duties. ()

By the mid-2360s, this class of "old-style" star cruiser was on the fringe of being phased out of the fleet. Those that had been decommissioned, including the eighty-year-old Hathaway, were stripped of their offensive systems and rendered "warp inactive," which included the removal of all antimatter. () 

Those that remained in service were typically relegated to transport duties. () Constellation-class starships were also used in second-line service, including the hastily-organized Federation blockade during the Klingon Civil War, and later participated in the Dominion War in 2374. (; ( okudagram)

Technical data

Crew 
A ship of this class could be manned with a crew of forty. ()

Propulsion systems 

One notable feature of the Constellation-class was that it was outfitted with four warp nacelles. (), et al.) The Constellation-class had a maximum speed of warp 9. ()

During their original construction, Constellation-class starships employed Avidyne engines. By the latter 24th century, these had been replaced with more effective engines. () These starships had at least two impulse reactors. ()

In 2369, Captain Jean-Luc Picard, commander of the   regarded his former command, the Constellation-class USS Stargazer as being "an overworked, underpowered vessel that was always on the verge of flying apart at the seams," adding, "in every measurable way, my Enterprise is far superior." However, he did admit that there were days when he would've done anything to be back aboard the Stargazer. ()

Interior design

Main bridge 

Although the layout of the main bridge of the Constellation-class of starships could be described as "standard" in terms of how Federation starship bridges are designed, the Constellation-class appeared to have two prominently different bridge types. These variations can be recognized between the , launched in 2285, and the , last active in 2355.

The Hathaway-type bridge had an unusual arrangement, with front of the bridge relatively wide open and the primary stations cramped in the rear of the bridge. 

The helm and navigation stations were located on the extreme port and starboard sides of the ship with the captain's chair near the center of the bridge. This gave the captain an unobstructed view of the viewscreen located at the front of the bridge. Next to the captain's chair, set less than a meter back and off to the right, was the first officer's chair with console. 

Directly behind the command chairs was the tactical station, with the engineering station to the far rear (on the port side) and science station to the far rear (starboard side). In front of the engineering station was an entryway to the bridge entryway. ()

Described as a "cramped little bridge" by Picard, the Stargazer-type was actually less cluttered than the Hathaway-type, with a design more reminiscent of the refit  or  bridge. ()

In the front was the viewscreen, with side-by-side helm and navigator consoles, a feature that noticeably contrasts that of the Hathaway-type. The captain's chair was directly aft the aforementioned stations; no accommodations were present for the first officer in this type. 

At the rear of the bridge, a tactical station was found on the far left with monitors along the back wall behind the captain's chair, with a second primary station located on the opposite side of the bridge. The primary stations were attached to the rear wall of the bridge; support railing partially enclosed that section from the front of the bridge. On either side of the rear wall monitors and between either primary station were two turbolifts. Along the port wall, directly to the left of the captain's chair and between the tactical station and the viewscreen, was the entryway to the captain's ready room. ()

Main engineering 
Main engineering was where the ship's power systems were controlled and was the home of the ship's antimatter warp drive chamber and impulse engine controls. ()

Crew cabins 

Cabins aboard Constellation-class starships were of typical design associated with Federation starship of the era, providing spartan accommodations for the crew. ()

Ships commissioned 
Named
  (NX-1974)		
  (NCC-2593)	
  (NCC-2893)	
  (NCC-9754)	

Unnamed
 NCC-7100

Appendices

Appearances 
 
 
 
 
 
  (display model and graphic)
  (model)

Background information 
The first Constellation-class ship seen, the Stargazer, was originally planned to be a  ship, allowing the visual effects staff of  to make use of the existing movie  model. Actually, the producers did not make the decision to build a new, full scale filming, or studio model, of the Stargazer until after the episode was filmed with both Wil Wheaton and LeVar Burton calling it a Constitution. The choice of the name "Constellation" was based largely on the fact that it could be dubbed over La Forge's line since the two words are so similar. (; )

In Vonda N. McIntyre's ization of , the  is referred to as a Constellation-class starship instead of Constitution-class.

Studio model 
See main article: Constellation-class model

The Magazine 
A Starfleet Technical Database-article appearing in  that was later written by designer-creator Rick Sternbach stated that this class of ship had fifteen decks and a crew complement of 535 and that the class consisted of eight vessels (including the USS Gettysburg and USS Magellan). In addition to the aforementioned, the article also stated that a  (NCC-2590) and a  (NCC-9761) existed, the latter named after an admiral who oversaw the development of Constellation-class starships. The class's mission statements were: long-range sensor analysis within threat territories, communications, intelligence gathering, deployment and retrieval of cargo and stealth shuttles, general science and patrol duties.

External links 
 

cs:Třída Constellation
de:Constellation-Klasse
es:Clase Constellation
fr:Classe Constellation
ja:コンステレーション級
nl:Constellation klasse
Federation starship classes