this idea is stolen from another space sim

Every sector that has asteroids in it should contain one special 100% pure asteroid of a random type

this special asteroid should vanish once its contents have been mined and another should spawn in a random position

you would recieve bonus mining exp for "poping" them

so, an asteroid debris with 100% of a randomly selected ore, and its heat never decreases and - on reaching a specific point, causes the asteroid health to deplete. anyone mining the debris when it pops gets an extra snack of exp. or, perhaps, any heat above the default (iirc its 10k?) takes away health points in exchange for cooling by outgassing?

I suppose there should be a timer so if someone kicks the asteroid too far out that it will despawn. Also dunno if every sector needs one of these asteroids; perhaps maybe 2-4 per system?

you could even have NPC "prospectors" who undock from the station every few hours and have a %% chance of revealing what sector to find those asteroids in.