Most Central Planet

[Rydralain]

Here is a link to a 3D map of the homeworlds.

A 3D map of the universe

Simoyd has a program on github that allows you to create a approximation of what the planets might be close to in position. i ran that a bit and it spit out this https://xyberviri.github.io/boundless/planets.html have fun

Basically, Till, Circa and Delta are the three centermost worlds.