Wow, thanks everyone! I had 72 reputation gains this morning…. 
Yep, I actually tried various configurations with the map. I originally started with the north pyramid being Merope, the large pad being Sol, and the large ridge being the Y axis pointing towards Sag A, but the distances and math just don’t line up. Every different direction I tried was a bust, the only one that worked (and worked precisely no less) was the one I ended up with.
The ruins themselves pretty much dictated the orientation of the map, which I thought was very telling in itself. Still, if someone can find another orientation which works better…
My skepticism comes from the assumptions made. The first is that the prominent circle is the system containing the ruins - this may just as well be somewhere else (e.g. the home system of whomever created the ruins). The second is that a pyramid represents Sol - this is based on the first assumption and a measurement in metres. This could make sense if this was a human site created after the adoption of the metre (or some shoddy FDev storytelling) but then you'd think Sol would have more prominence.
Yep, I actually tried various configurations with the map. I originally started with the north pyramid being Merope, the large pad being Sol, and the large ridge being the Y axis pointing towards Sag A, but the distances and math just don’t line up. Every different direction I tried was a bust, the only one that worked (and worked precisely no less) was the one I ended up with.
The ruins themselves pretty much dictated the orientation of the map, which I thought was very telling in itself. Still, if someone can find another orientation which works better…