I did a large enough update that I thought I should mention it here. First, I changed the reference systems for many (most) nebulae, as an earlier bugfix with Odyssey changed how they look, and also because we can use the in-game search bar on the nebula names now. The legacy GMP data used approximated visual centers, but those have moved. Now, the reference systems should be the ones closest to the actual centers.
Second, something interesting: I added a new nebula entry, because somehow, I missed Bya Phlai AA-A h2 all these years. I'm not sure how I did that, because it's not a small one tucked away in a remote corner. (And I hope I didn't miss any others!) But then, this was apparently quite an unlucky nebula, as the only mention I've found about it so far was a submission to the GMP that somehow fell through the cracks. So, somebody visit this nebula please, so it'd be a bit less lonely! It's not even that far from the Sol-Colonia line.