Just picked up a UA from a SSS in HR 1185 now. Happy to donate it to a commander, only for scientific research of course.
Congratulations - thanks for sharing (in both ways

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The gap Ecco mentioned, would it be possible to jump through it?
No way I can get in game - but I'm guessing this is just a barren patch without stars? Well, I think a few people have Annys which can do nearly (or is it just over) 40ly - but that's about as far as we can get.
Ladies, Gentlmen,
I think that easily proves one thing. Hopefully I am reading this right.
Black holes here are used as distribution systems (or destinations with high enough mass for super long jump transfers) for these "artefacts". Correct? I prefer intention over RNG.
But we do not have enough pieces of the puzzle to prove or disprove.
Remember, they have been spotted in the same system away from the BH, and one has been recovered from HR1172 as well - in which there is no BH.
However - there certainly seems to be a region around the BH that yields more UAs than other places - so I'd make a similar conclusion to you and quite a few other people: the BH is important somehow. As a fix for a long-range jump? Perhaps - 100% more plausible than UAs flying out of the black hole itself
Well done everyone all round - history will remember you. Ahem.
Now back to work for me...
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How do they get to the adjacent system(s)?
I'm more inclined to think the things are there scoping out the blue stars and/or metal planets and the black hole connection is a coincidence.
+1
First point there is a good one... But just consider, according to Elite lore (and one or two books I've read) it's possible to get small recovery capsules that can jump between systems - so the same could be true of these - especially if they're alien and more advanced.
And your second point - I like that, too. Also - seems that it is entirely compatible with them arriving at BHs, but implies that you might expect to find them close to the Blue stars (isn't that where the 1172 one was found?) and around said planets.
Very easy to confirm - which is the kind of idea that this place needs
Black holes are not super massive however, for in HR 1185 the Blue star is 4 times the mass of the Black Hole companion, so why the Blackhole would be picked over the more massive star as the jump point target over super long ranges I do not know
Assuming the black hole is feeding on something, then it will be emitting higher levels of energy than the star? So not just mass - energy too?
Admittedly - the other behaviour we have - Morse - appears to be based on mass, so, it's a bit of a reach
