It should also be noted that Trek warp factor is not always static. It's why in DS9, TNG, and TOS, ships can reach far-off places while Voyager can be trapped across the galaxy. It's suggested by some fans that part of the reason that the NX-01 needed the Vulcan Starcharts was specifically for the purpose of a subspace highway that would allow them to reach Kronos within a practical time frame. In other words, Voyager was lost because there are not established subspace highways to quickly get her back home, where as in The Chase, they took three highways that amounted to no more than a 17 day trip. EDIT Upon further study of this subject, it seems that the exact size of the UFP is almost impossible to pin down. According to several sources, real stars located within or on the edge of Federation space are in some cases, around three thousand light years away from the Sol system towards the western hemisphere, such as Deneb. Compare this to Trials and Tribbulations, where the Defiant is stated to have traveled 200 light years or in another episode, where Earth is suggested itself to be hundreds of light years away. At the lowest interpretation, that puts K-9 roughly in the same area as the Sol system in terms of distance. That's a rather hard pill to swallow, unless K-9 is a Alpha Quadrant station (possible). However, other problems arise. The first being is that in Enterprise, Kang stopped by Rigel on his way to Earth. Rigel is located over 600 light years away from Earth and was on the NX's four day trip to Kronos. With a warp five engine. Needless to say, the problems here are rather large. A website goes into this problem in depth, pointing out that DS9 constantly painted the UFP as small, but that TNG, the movies, and TOS constantly painted it as big--something that Enterprise seems to paint as well. Hell, the NX was over a hundred light years away when it ran into one of the planets within Romulan territory, suggesting a nearby system for the future Neutral Zone, which itself is I believe, a light year wide. The site suggests a compromise between the two concepts. It suggests that Earth and the planets around it compose of a territory a few hundred light years in size, with the Klingon and Romulan Empires to the west and the Cardassian Union and the Breen Confederacy to the east. It also suggested that there are different sections of the UFP. Ie, that the UFP proper is the capital core, with there being a Rigel Core and a Deneb Core, where parts of the UFP is located.