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The following is a list of unnamed Alpha and Beta Quadrant sectors.

Sector in simulation[]

This sector was mentioned in a scenario designed to test Cadet Thira Sidhu in the mid-23rd century. According to the scenario, the USS Bouman was in the sector when it was captured by Tholians. The USS Enterprise was in the same sector and attempted to intervene. (ST: "Ask Not")

The sector might also be the one containing Starbase 28, because Pike claimed to have arrived there within two hours of receiving the Bouman distress call aboard the Enterprise.

Sector patrolled by USS Enterprise[]

This sector was being patrolled by the USS Enterprise in 2267 when it received an alleged subspace message from Starbase 11. The sector was untroubled, with no alien problems. (TOS: "The Menagerie, Part I")

Sector containing Murasaki 312[]

This Alpha Quadrant sector contained the quasar-like formation Murasaki 312 and at least four star systems, including the system containing the planet Taurus II.

In 2267, the USS Enterprise traveled through this sector on its course to Makus III. During the starship's time in the sector, Murasaki 312 ionized the entire sector. (TOS: "The Galileo Seven")

This sector's quadrant of origin is inferred based on the position of Murasaki 312 as seen in the star chart appearing in the Star Trek: The Next Generation episode "The Wounded".

Sector where the Enterprise discovered the Botany Bay[]

This sector was where, in 2267, the USS Enterprise discovered the SS Botany Bay. For years prior to this discovery, there had been no flights into this sector by Earth ships. (TOS: "Space Seed")

According to the 4th edition of the Star Trek Encyclopedia, this sector was the Mutara sector (vol. 2, p. 60) or was adjacent to the Mutara sector (vol. 1, p. 98).

Sector containing Unit XY-75847[]

This sector was where, in 2267, Unit XY-75847 reported the sighting of a fleet of Klingon ships to Starfleet Command. This sector was located in the same quadrant as Organia. (TOS: "Errand of Mercy")

Sector containing System L-370[]

This Alpha or Beta quadrant sector contained several solar systems, including L-370 and L-374. (TOS: "The Doomsday Machine")

According to the revised edition of the Stellar Cartography: The Starfleet Reference Library ("History of the United Federation of Planets"), which shows where the USS Constellation was destroyed, this sector was located near Klingon space.

Sector containing Babel[]

As the Enterprise was assigned to this Alpha Quadrant sector in 2268, it was given the mission of transporting the delegates of Federation planets to a council on the planetoid Babel. (TOS: "Journey to Babel")

This sector's quadrant of origin is inferred based on the position of Babel as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

Sector containing Capella IV[]

This Alpha Quadrant sector contained the inhabited planet Capella IV.

In 2267, the Enterprise visited this sector on a mission to Capella IV. Prior to this mission, Klingons had been detected in the sector. The USS Carolina was registered as being in this sector. (TOS: "Friday's Child")

This sector's quadrant of origin is inferred based on the position of the Capella system as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

Sector containing Romulan Neutral Zone[]

This sector, containing a section of the Romulan Neutral Zone, was where the Enterprise entered the Zone, on a direct course, to Starbase 10 in 2267. (TOS: "The Deadly Years")

Sector containing M24 Alpha system[]

This sector, containing the M24 Alpha system, was where the Enterprise, in 2268, followed an ionization trail to the planet Triskelion in the named system, where she retrieved her landing party. The sector was described as being empty by Montgomery Scott. (TOS: "The Gamesters of Triskelion")

Sector containing Starbase 6[]

This sector, containing Starbase 6, was visited by the Enterprise in 2268. It was located near Sector 39J. At the time of the Enterprise's visit, there were no indications of magnetic storms in the sector. (TOS: "The Immunity Syndrome")

Sector containing System 892[]

This sector, containing System 892, was first charted by the Federation survey ship SS Beagle in 2262. Six years later, the USS Enterprise would investigate the disappearance of the Beagle in this sector. (TOS: "Bread and Circuses")

Sector containing Beta XII-A[]

This Alpha Quadrant sector, containing the planet Beta XII-A, was where, in 2268, the USS Enterprise and Kang's battle cruiser were lured to the named planet by distress calls fabricated by the Beta XII-A entity. This sector was scanned by the Federation starship for other ships, with negative results. (TOS: "Day of the Dove")

This sector's quadrant of origin is inferred based on the position of Beta Leonis Minoris, the star system which contained Beta XII-A, as seen in the star chart appearing in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad".

Sector containing Taurean system[]

This sector contained the Taurean system. Earth vessels associated with the Federation had visited it for at least a century and a half before 2269. However, despite it long having been trafficked, Starfleet by 2269 still considered it an unfamiliar sector. Klingon and Romulan ships had visited the sector for some time as well, and ships from all three powers had disappeared in mysterious circumstances there. (TAS: "The Lorelei Signal")

In the novelization for this episode, found in Alan Dean Foster's Star Trek Log 2, this sector was named the Cicada sector.

External link[]

Sector containing Type 4 asteroids[]

In 2270, the USS Enterprise was assigned to this sector for a routine geological survey of type 4 asteroids. Near the completion of this mission, the Enterprise was ambushed by Romulan warships. (TAS: "The Practical Joker")

Sector containing Dramian star system[]

This sector, containing the Dramian star system, was where the USS Enterprise reported an aurora in 2270. (TAS: "Albatross")

Beta Quadrant sector[]

This sector was located in the Beta Quadrant.

In 2293, the USS Excelsior completed its exploration of the sector. Very soon after, a subspace shock wave originating from Praxis swept into the sector. (Star Trek VI: The Undiscovered Country)

Sector containing Quadrant 9[]

This sector, containing Quadrant 9 and a segment of the Neutral Zone, was the site of a historic battle. In 2364, the Talarian freighter Batris defeated the Klingon cruiser IKS T'Acog. (TNG: "Heart of Glory")

Sector affected by the Manheim Effect[]

This sector was affected by the Manheim Effect in 2364. At the time of the incident, the USS Enterprise-D was in this sector, on a heading to Sarona VIII. (TNG: "We'll Always Have Paris")

Unexplored sector[]

This sector, unexplored by the Federation as of 2364, was the target of a subspace message sent by the mother creature of parasitic beings from Earth, after their infiltration of Starfleet was foiled. (TNG: "Conspiracy")

Sector containing Star Station India[]

This sector contained the Federation facility Star Station India. This sector was adjacent to the Gamma 7 sector.

In 2365, the USS Enterprise-D was in this sector, on a heading to the Star Station India, when it received a distress call from the USS Lantree in Gamma 7 sector. After resolving the distress call, the Enterprise-D returned to the sector and rendezvoused with a Starfleet Medical courier at Star Station India. (TNG: "Unnatural Selection")

Sector containing three systems[]

This Beta Quadrant sector, containing a section of the Romulan Neutral Zone, contained three systems which had a number of cultural similarities, indicating they were being influenced by the Iconians.

In 2365, the USS Enterprise-D rendezvoused with her sister ship, the USS Yamato, in this sector. (TNG: "Contagion")

Sector traversed by Enterprise[]

In 2365, the USS Enterprise-D was traversing through this sector when the Ansel Adams was reported as missing from Shuttlebay 2. In its search for the missing shuttlecraft, the Enterprise-D did a sensor search of the sector, revealing no other shuttles or ships in the region. (TNG: "Q Who")

Sector containing J-25 system[]

This sector, containing the J-25 system, was, by 2365, unexplored by the Federation. It had been visited in the past by the El-Aurians and by the Borg, who had assimilated the civilization on the sixth planet of J-25. In that year, the USS Enterprise battled a Borg cube in this region. The nearest starbase to this sector was Starbase 185, which was at the maximum warp of the Enterprise-D two years, seven months, three days, eighteen hours away. (TNG: "Q Who")

Sector containing Boradis system[]

This sector, in Federation territory in the mid-24th century, contained the Boradis system as well as several Federation colonies. The first colony, an outpost, was established on Boradis III in 2331. As of 2365, there were four colonies in the Boradis system and nine outposts in other systems in the sector. (TNG: "Emissary")

Sector containing Galorndon Core[]

This sector, containing the Federation planet Galorndon Core, was a region of space claimed by the Federation in the Beta Quadrant. In this sector, the Romulan Neutral Zone was located half a light year away from Galorndon Core. (TNG: "The Enemy")

This sector's quadrant of origin is inferred based on the position of the planet Galorndon Core as seen in the star chart appearing in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad".

Sector containing Acamar system[]

This sector, containing the Acamar system, was a region of space in the Beta Quadrant. In the mid-24th century, the Gatherers attacked Federation research facilities and disrupted Federation trade routes in this sector. (TNG: "The Vengeance Factor")

This sector's quadrant of origin is inferred based on the position of Acamar as seen in the star chart appearing in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad".

Sectors neighboring the Acamar system sector[]

These Beta Quadrant sectors, neighboring the Acamar system sector, were invaded by the Gatherers in the mid-24th century, who attacked Federation outposts located there. (TNG: "The Vengeance Factor")

These sectors' quadrant of origin is inferred based on the area of space where it would be located as seen in the star chart appearing in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad" and in the Star Trek: Picard episode "Maps and Legends".

Federation sectors threatened by Nelvana III base[]

In 2366, these sectors, numbering 15 in total, would be, according to Romulan logistics officer Setal, threatened by a base on Nelvana III. These sectors would be in "striking distance" of Romulan warbirds sent from this planet. During the incident at Nelvana III, in these sectors, outposts along the border of the Neutral Zone received warnings from Starfleet Command. (TNG: "The Defector")

These sectors were only mentioned in dialogue.

Romulan sector[]

This distant sector in Romulan territory was the assignment for the logistics officer Sublieutenant Setal, who worked under Alidar Jarok. The region was mentioned in an interrogation led by William Riker of Setal in 2366. After Setal was revealed to be the admiral, Jarok stated that he was assigned, as its command officer, to this sector after being censured for his outspokenness against the militant policies of the Romulan High Command. (TNG: "The Defector")

This sector was only mentioned in dialogue.

According to a deleted line from the script, this was originally intended to be Sector 814.

Sector containing Bre'el IV[]

In 2366, the Enterprise-D contacted all ships in this sector, requesting that they rendezvous with the Federation starship and join them in relief efforts, as the planet Bre'el IV was threatened with its asteroidal moon impacting the larger body. (TNG: "Deja Q")

Sector containing Tanuga system[]

In 2366, the Enterprise-D was assigned to a mission in this sector. As the Tanuga system was located in this sector, the Federation starship paused its mission, dropping off William Riker and Geordi La Forge at the Tanuga IV research station so they could check on the progress of Dr. Nel Apgar's work on a Krieger wave converter. Before getting its officers back, the Enterprise-D concluded its study of a protostar cloud. (TNG: "A Matter of Perspective")

Sector containing Narendra III[]

This sector, in the Beta Quadrant, contained the Narendra system.

In 2346, the USS Enterprise-C received a distress call from the Klingon outpost on Narendra III. After scanning the sector for other Federation ships, with negative results, the Enterprise-C responded to the call. It entered into battle with Romulan warbirds, eventually being destroyed. Its sacrifice impressed the Klingons, who entered into a peaceful relationship with the Federation.

In 2366, the USS Enterprise-D was on a mission in this sector when a temporal rift, caused by the formation of a Kerr loop from superstring material, resulted in an alternate timeline in which the Federation was at war with the Klingon Empire.

In this new timeline, Starfleet monitor stations sent a message to the Enterprise-D informing the starship that Klingon battle cruisers were heading to this sector. The Federation starship protected its predecessor, the Enterprise-C, from the enemy vessels as the latter ship returned to the past, thereby restoring the timeline. (TNG: "Yesterday's Enterprise")

This sector's quadrant of origin is inferred based on the position of the Narendra system as seen in the star chart appearing in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad".

Sector containing Khitomer system[]

This sector, in the Beta Quadrant, contained the Khitomer system.

In 2346, in the aftermath of the Khitomer Massacre, a sensor scan of the region by the USS Intrepid revealed that the attacking spacecraft, presumed to be Romulan warbirds, were no longer in the sector. (TNG: "Sins of The Father")

This sector's quadrant of origin is inferred based on the position of the Khitomer system as seen in the star chart appearing in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad".

Sector containing Risa[]

This sector, in the Alpha Quadrant, contained the planet Risa. (TNG: "Captain's Holiday")

This sector's quadrant of origin is inferred based on the position of Risa (Epsilon Ceti) as seen in the star chart appearing in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad". This sector might be the same as Sector 25712, a sector associated with nearby Starbase 12.

Sector containing Zeta Gelis star cluster[]

This sector was the location for the Zeta Gelis star cluster. It was located adjacent to Sector 9569. The Federation had incomplete information about this sector.

In 2366, the USS Enterprise-D was assigned a mission to this sector to chart the star cluster. (TNG: "Transfigurations")

Sector containing Starbase 133[]

This sector was the home for Starbase 133.

In 2367, in the reality created by Beverly Crusher, the Wellington was one of two Federation vessels in this sector; the other being the USS Enterprise-D. It reported no unusual readings after Wesley Crusher had performed warp field experiments aboard the Enterprise-D. (TNG: "Remember Me")

Sector containing Gamma Arigulon system[]

This sector was home for the Gamma Arigulon system.

In 2367, the starship LaSalle reported radiation anomalies from the Gamma Arigulon system. Later, as the USS Enterprise-D was investigating the system's star, the Federation starship was greeted by K'mpec's attack cruiser. This was a surprise as Starfleet had not mentioned the presence of Klingon vessels in the sector. (TNG: "Reunion")

Sector containing Gamelan system[]

This sector was the location for the Gamelan system.

In 2367, the USS Enterprise-D entered this sector to help Gamelan V with a waste ship which was threatening the planet with increased radiation levels. The Enterprise successfully destroyed the waste ship. When the Enterprise received the distress signal, there were no other ships in the sector. (TNG: "Final Mission")

Sector where Enterprise-D rendezvous with the Devoras[]

This sector was the location for a section of the Romulan Neutral Zone.

In 2367, according to a tactical projection by Data of Romulan deployments in this sector, the Romulan Star Empire placed their ships along the border with the idea that they were there to support a "policy of confrontation designed to test Federation defenses." There was a 90 percent probability that the empire would continue the policy into the near future.

The USS Enterprise-D rendezvous with the Devoras in this sector. (TNG: "Data's Day")

Federation sectors threatened by Cuellar system science station[]

These three sectors in the Alpha Quadrant were near to the Federation-Cardassian border.

In 2367, these sectors would be, according to Captain Benjamin Maxwell, threatened by the Cardassian science station, if it was a military transport station, in the Cuellar system. The Cardassisn could use the system as a jumping-off point into these sectors. (TNG: "The Wounded")

These sectors were only mentioned in dialogue.

These sectors' quadrant of origin is inferred based on the position of the Cardassian Union as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

Sector containing Ventax II[]

This sector was home to the planet Ventax II.

Until her arrest by the Ventaxians in 2367, the con artist known as Ardra had been "deceiving innocent people with her petty schemes" in this sector for many years. (TNG: "Devil's Due")

Sector containing Tagus III[]

This sector, in the Beta Quadrant, was home to the planet Tagus III.

As one of his reasons for visiting the Enterprise-D, Q claimed he happen to be in the same sector as the Federation starship. (TNG: "Qpid")

This sector's quadrant of origin is inferred based on the position of the Tagus system as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

Sector containing Kriosian system[]

This sector, containing the Kriosian system, was located in the Beta Quadrant.

As of 2367, there were no protostars in this sector. (TNG: "The Mind's Eye")

This sector's quadrant of origin is inferred based on the position of the Kriosian system as seen in the star charta appearing in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad" and in the Star Trek: Picard episode "Maps and Legends".

Sector containing the Mar Oscura Nebula[]

This sector was home to the Mar Oscura Nebula.

In 2367, while in a romantic relationship with Jenna D'Sora, Data said that he was the "most fortunate sentient in the sector" because he was with her. (TNG: "In Theory")

Klingon sectors[]

These sectors were located in Klingon space.

In 2367, seven of these sectors were considered "key strategic sectors" by Captain Kurn in 2367.

In that year, prior to the Klingon Civil War, four squadron commanders assigned to these sectors were supportive of Kurn. After speaking with Kurn, three of the four squadron commanders agreed to back Gowron in the upcoming civil war, giving Gowron the strength to control these sectors. (TNG: "Redemption")

Over three weeks later, Gowron's forces launched attacks against the House of Duras' forces in three sectors, forcing the Duras family to send an urgent message to the Romulans saying that they were near defeat. (TNG: "Redemption II")

One of these sectors might be the Mempa sector, for this is where Captain Kurn meet the squadron commanders.

Solarion system sector[]

This sector, in the Alpha Quadrant, contained the Solarion system. This system was along the Federation-Cardassian border.

In 2368, the colony on Solarion IV was destroyed by an unnamed vessel. An investigation later concluded the attack was staged by the Cardassians.

By 2368, the Federation had dozens of settlements in the sector. (TNG: "Ensign Ro")

This sector's quadrant of origin is inferred based on the position of the Cardassian Union in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

Lefler's parents' sector[]

This sector was where Robin Lefler spent her childhood in the 24th century.

Lefler's parents were the only plasma specialists in the sector, meaning they traveled constantly, going from base to base. (TNG: "The Game")

This sector was only mentioned in dialogue.

Sector containing Penthara IV[]

This sector contained the inhabited planet Penthara IV.

Professor Berlinghoff Rasmussen said, in a conversation with Captain Jean-Luc Picard, that if he influenced events at Penthara IV, he might change the history of this sector. (TNG: "A Matter Of Time")

Sector containing Bilana III[]

This sector contained the planet Bilana III.

In 2368, Helena Rozhenko and Alexander Rozhenko were in this sector. When Helena heard that the USS Enterprise-D was in the sector, she took the first transport which would get her to the Enterprise. (TNG: "New Ground")

Sector containing binary star system[]

This sector contained a binary star system.

In 2368, this sector was mapped by the USS Enterprise-D. Other than the unusual sighting of the binary star system, the mapping was routine. (TNG: "Violations")

In the script for this episode, this sector was identified as "Sector 22139". [1]

Sector containing the Dyson sphere[]

This sector contained a Dyson sphere.

In 2294, the USS Jenolan crash landed onto this sphere. The Federation transport ship sent out a distress call, which was picked up by the USS Enterprise-D in 2369. (TNG: "Relics")

Triona system sector[]

This remote sector contained the Triona system. Its isolation led Beverly Crusher to speculate that Lieutenant Keith Rocha could have been absorbed by a coalescent organism while posted there. (TNG: "Aquiel")

Sector containing Arkaria[]

The sector containing Arkaria was notable for having several cultures with extremely similar etymological histories. (TNG: "Starship Mine")

Sector containing the Loren system[]

This sector contained the Loren system. Cardassia had no claims on this sector.

In 2369, the Loren sysem was visited by starships from the Cardassian Union, the Klingon Empire, and the United Federation of Planets in their search for clues to a 4.5 billion years old genetic code left behind by the ancient humanoids. (TNG: "The Chase")

Sector containing Ohniaka III[]

This sector was located in Federation space. Within this sector, there was the planet Ohniaka III, in the Ohniaka system, and the MS I colony, in the MS system, and the New Berlin Colony. There were additional colonies and outposts in this sector.

In late 2369, rogue Borg attacked the Ohniaka III Research Station, killing all the personnel at this station. In the aftermath of the attack, a fleet of 14 Federation starships was ordered to the sector by Starfleet Command. Along with the USS Enterprise-D, which had responded to the distress call from the research station, these ships patrolled the sector. (TNG: "Descent")

Sector containing Iyar[]

This sector contained Iyar, a planet known for its "spectacular crystal formations" that was the homeworld of the Iyaarans, and a Class M planet. (TNG: "Liaisons")

Quantum incursion sector[]

This sector was the location of a quantum fissure, which caused Worf to experience different quantum realities. This sector had at least one star system.

In one such reality, when a Bajoran ship attacked the USS Enterprise-D, this event caused the quantum fissure to de-stablize, resulting in the barriers between quantum realities to break down. Hundreds of thousands of Enterprises began to appear, and, according to Data's calculations, the whole sector would be completely filled with Enterprises in three days.

Upon Worf successfully returning to his quantum reality in this sector, the quantum fissure closed up. (TNG: "Parallels")

Sector containing Boraal II[]

This sector was home to the formerly inhabited Boraal II, which was rendered lifeless by atmospheric dissipation in 2370.

That year, knowing that the USS Enterprise-D was in this sector, Dr. Nikolai Rozhenko sent a distress call from an observation post on Boraal II, hoping that this starship would be the one to respond. The scientist had family, Worf, aboard the ship. (TNG: "Homeward")

Devron system sector[]

This sector, containing the Devron system, was located in the Beta Quadrant.

In an alternate timeline, in 2395, Admiral William Riker read a report on this sector by Starfleet Intelligence. The agency reported no unusual activity in the Devron system. Some time later, after the USS Pasteur had entered the sector, the Klingon Empire sent several warships into the sector to search for the vessel. (TNG: "All Good Things...")

This sector's quadrant of origin is inferred based on the position of the Devron system as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

Sector with increased Maquis activity[]

This sector, located inside the Alpha Quadrant, was where the level of Maquis activity had increased in 2371. In response, the Cardassian Central Command had dispatched Galor-class warships, including a ship commanded by Gul Benil, into this sector to stop and search all incoming ships. With the assistance of Garak, the USS Defiant was able to successfully travel through this sector on its way to Cardassia Prime. (DS9: "Second Skin")

This sector's quadrant of origin is inferred based on the position of the Cardassian Union as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

Sector containing Omekla III[]

This sector, located inside Cardassian space in the Alpha Quadrant, contained the planet Omekla III. This planet was home to shipyards, which, for an attacker, were not the best choice as there were at least half a dozen better targets in this sector.

In 2371, in an effort to draw the Cardassian warships from Orias III's sector, the USS Defiant, under the command of Thomas Riker, attacked targets in this sector. Riker's group, the Maquis, believed there was an invasion fleet being built at Orias. (DS9: "Defiant")

This sector's quadrant of origin is inferred based on the position of the Cardassian Union as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

Lines deleted from the final episode identified a weapons depot in the Dameron system and a communications relay on the Rokat colony as targets in this sector.

Sector containing the Orias system[]

This sector, located inside Cardassian space in the Alpha Quadrant, contained the Orias system. This sector was under the control of the Obsidian Order.

According to Gul Dukat, there was nothing of value in this sector.

In 2371, the Maquis got their hands on an intelligence report which said that the Cardassians were building an invasion fleet at Orias III. To verify the report, the USS Defiant, under the command of Maquis operative Thomas Riker, launched an attack into Cardassian space. Needing to get close to the Orias system, the Defiant attacked targets in an adjacent sector, drawing Cardassian warships guarding this system into this region.

It was later proven that the Obsidian Order was building ships for a planned offensive against the Founders in the Gamma Quadrant at Orias III. (DS9: "Defiant", "Improbable Cause")

This sector's quadrant of origin is inferred based on the position of the Cardassian Union as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

Sector containing Barisa Prime[]

This sector, located in the Alpha Quadrant, contained the planet Barisa Prime. This Federation colony was near the Federation-Tzenkethi border. A spatial landmark in this sector was the Helaspont Nebula.

In 2371, the USS Ulysses was studying protoplanetary masses in the Helaspont Nebula when the USS Defiant was on its way to the border through this sector. (DS9: "The Adversary")

This sector's quadrant of origin is inferred based on the position of the Tzenketh system as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

Sector attacked by Klingon bird-of-prey[]

This sector, located in the Alpha Quadrant, was within Cardassian space. It contained the planet Rakal and the systems Amleth and Loval.

In 2372, a Klingon Bird-of-Prey, commanded by K'Temang, invaded this sector during the Klingon-Cardassian War, targeting installations of high military value. (DS9: "Return to Grace")

This sector's quadrant of origin is inferred based on the position of the Cardassian Union as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".

The planet Korma might be located in this sector, as well.

Sector attacked by Nausicaans[]

In this sector, Earth Cargo Service freighters were frequently attacked, over a time period lasting years, by Nausicaan pirates. Travis Mayweather knew about the sector and the repeated attacks within it. One of the freighters which was assaulted in this area was the ECS Fortunate, which consequently sustained heavy damage, in 2151. When Enterprise NX-01 arrived to investigate the aftermath of the battle, the starship's crew found no other ships in the region. Despite subsequent onslaughts by the Nausicaans, Matthew Ryan, who was temporarily in command of the Fortunate, refused Enterprise's help, which his commanding officer, Captain Keene, reasoned was due to Ryan and others who had grown up on the freighter feeling that they had some special claim to ownership of this particular stretch of space and who typically became jumpy when they saw another ship within ten light years. After Keene resumed command of the Fortunate, Enterprise departed from the area. (ENT: "Fortunate Son")

In the first draft script of "Fortunate Son", Captain Archer recommended setting up regular patrols in this sector, to protect the freighters. However, Admiral Forrest, doubtful that plan would work, replied that the sector was "pretty big." Later in the teleplay, a freighter called the Gallant (later renamed the ECS North Star) was said to have been destroyed by Nausicaans in the same sector, a few years beforehand. In the final edit of the episode, however, the word "sector" is only mentioned once, when Mayweather tells Archer that Nausicaan pirates had been "attacking freighters in this sector for years."

Sector on edge of Federation space[]

At the start of the Federation-Klingon War of 2256, part of this sector was at the edge of Federation space. It contained a binary system with an accretion disk. (DIS: "The Vulcan Hello")

Given the close (six light years) distance of the binary star to Gamma Hydra, this could be the Gamma Hydra sector.

Uncharted Necro Cloud sector[]

The "escape pod" on which Kalara arrived at Starbase Yorktown in 2263 was tracked to coordinates 210 mark 14, in a sector of an uncharted nebula, the Necro Cloud. The area was uncharted due to the nebula being too dense. The USS Enterprise subsequently managed to penetrate the area, finding the planet Altamid. (Star Trek Beyond)

Sector containing Amargosa star[]

This sector , located in the Beta Quadrant, contained the star Amargosa.

In the late 24th century, the Federation research station Amargosa observatory observed the star from its location in the Amargosa system. In 2371, after receiving a distress call from the station, the USS Enterprise-D came to the rescue of the station's scientists. Upon discovering two dead Romulans, the starship sent a message to Starfleet Command about a possible Romulan threat to the sector. Soon afterwards, Amargosa was destroyed by Dr. Tolian Soran, resulting in major effects throughtout the sector. These included an increase in gamma emissions and changes in the gravitational forces, necessitating any starship traveling through the sector performing minor course corrections. As the Nexus entered the sector, these changes would alter its course towards the Veridian system. (Star Trek Generations)

This sector's quadrant of origin is inferred based on the position of the Amargosa system as seen in the star chart appearing in the Star Trek: Discovery episode "An Obol for Charon".

There was, as well, a change in the ambient magnetic fields; however, this change was not mentioned in the film.

Federation Headquarters sector[]

Federation Headquarters was located in this sector in 3189. (DIS: "Die Trying")

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