System 7743.8 was the Vulcan designation for an uninhabited star system, which was located somewhere in the Alpha or Beta Quadrant. It was near the Kontaran system.
In 2381, the Pakled clumpship Pakled tested a Varuvian bomb on a large asteroid in this system. The explosion produced a burst of metreon particles, which drew the attention of the Federation starship USS Cerritos and Vulcan cruiser VCF Sh'vhal.
The Klingon Bird-of-Prey IKS Che'Ta' subsequently rendezvoused with the Pakled in the system, whereupon they were discovered by the Cerritos and the Sh'vhal. A battle ensued between the two Federation vessels and the Pakleds and Klingons, which resulted in the Pakled retreating after the Klingons disengaged. (LD: "wej Duj")