Proxima Centauri
Proxima Centauri, also known as Alpha Centauri C or Proxima, was a star in the Alpha Centauri trinary system. It was the closest star to Sol, located approximately four light years away. The star was located in the Alpha Quadrant. (, production art)

In 2259, the location of this star was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. This star's symbol had a blue color, indicating that it was affiliated with the . () 

In 2364, the location of Proxima Centauri was labeled in a star chart of a stellar neighborhood with Sol at the center. This chart was stored in the  library computer. Later that year, the chart was scanned by Outpost 63. (, production art)

In 2399, the location of Proxima was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. This star was in or near to Federation space. () 

In 2401, the location of Proxima 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. ()

In 3190, the location of Proxima was labeled on a star chart used by Commander Paul Stamets for tracking the movement of the Dark Matter Anomaly through the galaxy. ()

See also 
 Proxima colony
 Proxima Maintenance Yards

Appendices

Background information 
The  classified Proxima Centauri as a red dwarf.

This star's quadrant of origin is inferred based on the position of its star system as seen in the star chart appearing in the  episode .

Apparently in an early draft script of , a Human colony established before 2156 was referenced as Alpha Proxima II, possibly intended as a planet in this system. The name was later replaced as Alpha Eridani II in the final episode. The Alpha Proxima II name, however, survived in such reference works as Star Trek Maps, Star Trek Concordance, the entry on StarTrek.com, and . 

A certificate naming the Proxima Centauri Interplanetary Bowling League was created for , but did not end up being used on screen. It was included in Star Trek: The Next Generation - The Continuing Mission (p. 76).

The chart naming stars within twenty light years of Sol was drawn by Rick Sternbach for the Star Trek Spaceflight Chronology (p. 77) in the late 1970s. This chart showed Earth commercial and exploration routes after the use of warp drive began. There were no commercial or exploration routes to Alpha Centauri C. 

According to Star Trek: Star Charts (pp. 19, 45, and 56) and the Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the Proxima Centauri system, consisting of Alpha Centauri C (an M-class star), was located in the Alpha Centauri sector (Sector 002). In 2120, Zefram Cochrane departed from the Alpha Centauri system on his final voyage. In the 22nd century, this system was a destination on the Earth trade routes and traded with Earth and . 

According to Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), Proxima (Alpha Centauri IV, Velestus) was an inhabited planet in this system. This planet had two moons, named Nykos and Tharon. The Proxima colony was founded on this planet in 2085. In 2161, this planet was a founding member of the UFP. In the late 24th century, the capital cities of this world were Cochrane and Tarola'n. The primary species of this planet was Human, with a population of 380 million. 

In a real-world corollary to Star Treks depictions, the discovery of an exoplanet orbiting Proxima Centauri, named  (lower case letters were used by Earth cosmologists in the early 21st century for planets orbiting a star) was announced in August 2016, by the  from one of their South American observatories, by a team led by .  

Adding further to this real-world analogy, later discoveries in the early 21st century suggested there could be two more planets in this star system. One, a cold planet in a further out orbit, was designated Proxima Centauri c.  The other, from a signal that was less well defined and so only seen as a potential candidate exoplanet, orbited inward of Proxima Centauri b.  So, Proxima Centauri b, just like Alpha Proxima II in the Star Trek universe, began to look like it actually was the second planet orbiting out from its star. In 2020, astronomers discovered a third planet, . This planet, slightly smaller than Earth, lies close to its sun and is not considered habitable.

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