I just finished the game, but I seem to be missing two artifacts. None of the systems on the map have the green artifact icon although two octo systems (lansde'ore and lairg'uie) are still locked. Any ideas what I've missed?

Nevermind. I missed the Hyma cluster altogether. I found my missing artifacts now.

If its any help, if you get stuck again, have a look at this map. Its helped me out when I've been stuck.
Thx a lot. This helped much.

The link in both posts is broken...