Any system that you have ships parked in while have a little ship icon next to it in the galaxy map. Is that useful to you?
It does have it and it's useful if I know which system cluster it's in or where it is relatively in the galaxy, but it's rather small relative to the max-size galaxies; I miiight have a mod that reduces the icon sizes but I don't think so. I end up having to park at memorable locations like the northernmost system.