Not yet. I went out to the system and surrounding area where the initial encounter was reported, made about 50 jumps in the area, in to Maia, and back out. No signs of anything unusual.
However, I was perhaps missing a critical element... Carrying an Unknown Artifact. These are easy enough to find, but I have as yet not "captured" one of them, treating them as potentially a living creature.
But some great screenshots while out there in the Pleiades. Wow. And I ran across a Capital ship, too. I have seen the Farragut Battle Cruisers in space before, but they had nothing around for scale. This thing was huge, easily larger than the surface outpost I had just left. I could see it visually about 80km from the outpost after I departed, and actually thought it was a larger outpost nearby. Only after flying closer did I realize what it was. You can see it just below the horizon (below the binary planet) on my first screenshot. Looks like a city.