The data known as the Clusternomicon is a myth, like Earth, like the Lost Generation Ships and aliens and so many other bits of folk lore that come out of the void.
Here we will gather what we can, using Chapter 2. Clusters, page 13-30 of Diaspora and share what we know of the universe. Please share what you know about the clusters in your ship’s navigational computers, so that we might make the void a little less cold.
I decided on 3 systems in the cluster but other than that, I rolled up the stats for each system randomly. It is really fun. I have only read that much of the book so far.