A warning to people who'd jettison UA-s in or near Merope: pirates still spawn there, and they might try to nab your artefact. I was in Merope, looking for something in polar orbit around the star, and at 10k ls out I dropped down from supercruise to check if the artefact still points at the star. So I jettisoned it, moved a bit closer and used the debug camera to see where exactly it was pointing. I was fiddling around a bit, and then suddenly something blocked out the view. I immediately switched back from the debug camera, to see a Federal Assault Ship right where the artefact was. A message from the ship's pilot, who was Deadly, had no faction affiliation and was called "Smed": "Your cargo now belongs to me."
I've just been pirated!
The guy turned to leave and charged his FSD, but as I was in a combat-explorer Clipper, I tried to get my cargo back from him. Unfortunately, the fight didn't turn out as I expected, and I ended up fleeing with 27% hull left.
So yeah, if you're carrying unknown artefacts near the bubble, be mindful of your surroundings.
Also, a question to Michael Brookes: can you tell us if there's anything special that can be found in Merope, apart from the barnacles?