If you’re gonna put the Death Star near a planet, I’d recommend something like Coruscant or Geonosis. It’d be cool if it was a rather alien planet and not too Earth-like.
Geonosis could work, since it’s pretty remote. Coruscant would be kinda weird.
It’s a secret weapon, parking it outside of the Galactic Capital would probably be noticed lol.
Thanks for the suggestions. I was going to add a planet nearby.