SR-47 was an inhabited location. Located near the Ficus sector, SR-47 was located in a region of space between sectors 184/02 and 185/38.
In 2120, the SS Seattle was launched from Earth on a diplomatic mission to SR-47. (TNG-R: "Up The Long Ladder", okudagram)
This location was only mentioned in writing.
In the remastered version of "Up The Long Ladder", SR-47 replaced ADR looping