Starbase 39-Sierra

Starbase 39-Sierra, or, more simply, Starbase 39, was a Federation starbase. This base was located in the Beta Quadrant.
In 2259, the location of this starbase was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. () 
In 2364, the helmsman of the , Geordi La Forge, suggested the could deliver their late-20th century passengers at this starbase. It was five days away, at warp 8, from the position of the Enterprise-D at the edge of the Romulan Neutral Zone in Sector 30. According to La Forge, it would reduce their travel time back to Earth by months. Additionally, Captain Picard thought the extra time would allow them to better acclimate to the 24th century. ()
From 2375 to 2379, Raffaela Musiker was assigned to this starbase as a security officer. ()
The starbase's location was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters in 2399 and on the bridge of the in 2401. Starbase 39-Sierra was in or near to space claimed by the Romulan Free State. ()
In 2401, the location of Starbase 39-Sierra was labeled on a star chart that was seen on the 's bridge viewscreen. The chart was used to show the location of the combined Starfleet-Borg armada and where it needed to go to face a galactic-level threat. ()
Later that year, this starbase's position was labeled on a star chart used by Captain William T. Riker during his attempt at finding the last known location of the . ()
In 3190, the location of this starbase, identified as Starbase 39, was labeled on a star chart used by Commander Paul Stamets for tracking the movement of the Dark Matter Anomaly through the galaxy. ()
== Appendices ==
=== Background information ===
According to Star Trek: Star Charts (p. 66, "United Federation of Planets I") and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), Starbase 39-Sierra was located in the Kaleb sector.
=== Apocrypha ===
The Star Trek: Typhon Pact Rough Beasts of Empire also mentions the starbase, placing it in the in the . Starbase 39-Sierra was prominently featured in the game Star Trek Online, in which it served as a hub for Federation missions along the Romulan Neutral Zone.
=== External link ===
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bg:Звездна база 39-Сиера
cs:Základna 39 - Sierra
de:Sternenbasis 39-Sierra
es:Base Estelar 39
fr:Base stellaire 39-Sierra
ja:第39宇宙基地シエラ
nl:Sterrenbasis 39-Sierra
0039-Sierra, Starbase