I may not so sure about that. I have tokens 1-12 and they corespond to planet artifacts 1-12. Once you claim a planet you flip the hex face up and and put it back under the planet. Then take the artifact card that matches that number. You leave the token under the planet turned face up so if someone else takes that planet they'll know what artifact comes with it.
get the Print and Play files, print out the numbers you're missing, and skillfully paste them to the tiles.
This is actually correct, there should be 12. I was thinking of a different game when I posted that. The same idea applies though so it can work with this one too though, lol.
As was mentioned, for Mothership, the artifact cards already have numbers on them, so you just have to link up what numbered card matches the token on the planet.