Starbase 105 was a Federation starbase administrated by Starfleet.
In an alternate timeline, Starbase 105 was intended to be the destination of the USS Enterprise-D and the salvaged USS Enterprise-C, following that vessel's emergence from a temporal rift in 2366. (TNG: "Yesterday's Enterprise")
- In the original script, Starbase 105 also alerted the Enterprise-D to the rift, but the line was changed during filming.