Ben, if I'd seen your post I would have skipped Kaupolock and Hrimfaxi!
I checked out Kaupolock, Hrimfaxi and 9 Puppis tonight.
None of the factions seem to have anything to do with LFT 509 at all. I'm already Allied with Federation so that helps speed things along. I took donation and delivery missions in each system to boost my personal rating with them, but it didn't make any difference.
One thing I did try was to buy trade data for every system I could around LFT 509.
The unsurprising outcome was there was a network of curves and lines all over the place, EXCEPT to or from LFT 509.
NO system within 20ly trades with LFT 509. It's like the Billy-no-mates of systems, everyone else plays together but they don't play with LFT 509.
I did notice something else about LFT 509 that I've not seen mentioned before...
From the system map view available for the system, the main star is indeed LFT 509 A.
The secondary star is Ross 54. The planets orbiting it are still identified at LFT 509 B 1, 2 etc.
The galaxy map screen gives an alternate identification for the system as Gliese 263.
Doing a search on that gave me
this page which gives another identifier, HIP 34104
Plugging HIP 34104 into Simbad gave me this page which confirms LFT 509 = Gliese 263 = HIP 34104 = Ross 54
So what's special about this system?
It appears on a list of x-ray sources and extreme UV emitting stars...
http://www.hs.uni-hamburg.de/DE/For/Gal/Xgroup/nexxus/nstarpage.cgi?identifier=0793
It has a very high "proper motion" or parallax through the galaxy relative to Sol...
http://wwwadd.zah.uni-heidelberg.de/datenbanken/aricns/cnspages/4c00542.htm
Apart from that, I can't see anything that makes this particular system stand out compared to any other.