Well, actually, this planet isn't a part of 'Known Space'. Its actually a part of the Chiss Empire, which is why it borders the Imperial Remnant. It is not, though, an Imperial planet, and it is technically within the Unknown Regions. The planet itself is just a rocky piece of junk without much there that not many people care about...except for good old Thrawn.
It was the former sight of his cloning facility, destroyed by Luke and Mara in Vision of the Future. Since then(which was one of the last things to happen pre-NJO books), the planet's nothing important. There's also some flight capable sentient species there of which their name is eluding me at the moment. But, again, its minor.
So...following canon, this planet isn't exactly the kind of place that would be involved with the Empire as the Chiss are extremely internal. One can't get to that planet without a long series of talks with the Chiss, and even then there's pretty much no chance of getting in. But, of course, this is just canon. Do with it what you want in your games, especially if the players have no idea about any of this.
