(covers information from several alternate timelines)
In 2364, the location of Procyon was labeled in a star chart of a stellar neighborhood with Sol at the center. This chart was stored in the USS Enterprise-D library computer. Later that year, the chart was scanned by Outpost 63. (TNG: "The Naked Now", production art; TNG: "The Last Outpost")
Star Chart Edit
This chart naming stars within 20 light years of Sol was drawn by Rick Sternbach for the Star Trek Spaceflight Chronology in the late 1970s. Found on page 77, this chart showed Earth commercial and exploration routes after the use of warp drive began. There were no commercial or exploration routes to this system.
Procyon (Alpha Canis Majoris) was located in or near Federation, in the Andorian Sector (Sector 006). This sector was located in the Beta Quadrant. The homeworld of the Andorians, Andor (Andoria), was located in this system. This was a binary star system. Procyon A was a F class star with a magnitude of +3, which was ten times brighter than Sol. Procyon B was an A class star. (Pgs 19, 45, 60)