The planet was of little interest. The magneto-ionic field distorts all of the relays for the interstellar cruisars and deep space scans don't show any ore or anything else the federation might need. A couple thousand years ago there were some scans done to indicate it might be able to support life, but there wasn't anything advanced on the surface to worry about. It's a worthless planet on the edge of federation space. Only asoteric scientists would ever want to go there.