I owe everyone an update. Never trust auto-scans on a carrier. There's an Earth-like nearby (Prooe Drye JY-F d12-77), the system we jumped to is upwards of 12 billion years old, there was planets hiding in black there, and I've since found some life.
I am switching to my Orca for some longer range exploration.
Plan likely staying until Friday night and then jumping.
I don't * think* the carrier auto-scans systems ... ? At least, I do not remember that happening for me.
Checking Frontier forum posts, I see many discussions around this - all reinforcing that fleet carriers do not scan systems.
Even if my carrier jumps into a system with me onboard, the scan of a new / undiscovered system only happens when I 'honk' in supercruise and use the FSS.
From memory, the 'basic' discovery scanner used to find all unknown bodies within about 500 Ls, not sure on the exact figure.
Maybe now it is the 1000Ls distance, which applies to some POI ?
I will jump my carrier - /
BASE\ - to the next area on the route, and follow along in my ship, looking for interesting stuff.
Do you have certain / specific things you are looking for?
If so, and you can share a list, I will look out for them and keep a record.