Is there anything in the Procyon system?

Yes, there are some wrecks and things to explore, but the main attraction is the Nomad city.

If you are in single player, you have the option to use godmode to explore the system (F1, Options, difficulty slider to the left)

If you are online, use "safe cruise" mode. (doesn't work in single player, so use godmode there instead)

In free flight (not Go To, Dock, or Formation), activate cruise engines using Shift + W, press Z (no need to wait 5 seconds, as soon as you see it charging, you can do this), then press Shift+W again, let it charge and you are in "safe cruise" mode.

Now the Nomads won't fire disruptors at you. You can use autopilot, as long as your ship doesn't stop for anything in the way. I recommend staying in Free Flight mode and flying manual (mouse flight) in hostile systems, and don't use formation on other players.