Sinuiji is a star system located a number of parsecs away from Earth and the Sol system, in Federation space, in quadrant 0 near the border between the galaxy's Alpha and Beta Quadrants.
History and specifics[]
Sinuiji was a binary star, consisting of the two stellar bodies Sinuiji and Ekinus.
The Federation starship USS Sinuiji was named for this location. (ST reference: Star Fleet Technical Manual)