How do I find a star system I previously visited?

So I have a massive colony in the star system "Sham Nexus" in my file. I was doing some renovations and accidentally uprooted the flag with the marker to warp there. No problem, I would put it back when I was done. Well, I died when I was doing renovations and I have absolutely no idea where this place is in the universe obviously without the marker. How do I find this system? Too much work has gone into it to keep playing without being able to go back.

 

Have you ever try to bookmark a planet you have ever visit before?

 

Well in that case this may help.
https://steamcommunity.com/sharedfiles/filedetails/?id=225370709

It may be about home planet, however it can be used for recent accessed planets or ones you frequent. You might have to check a few if you visited others after losing the flag.