Cruithne

Cruithne is the submoon of Artemis.

History
Little is known about Cruithne as it's speed, rugged terrain, heavy gravity influence with Artemis, among other hazards makes evidence about Cruithne's past incredibly hard to perform. What is clear about Cruithne is that the moon likely came into Artemis's gravity somehow, but evidence proves against this.

Physical Information
Cruithne is impossible to understand due to it's many hazards, but judging on appearance it is a cratered mess with much of it's terrain wiped out due to it's influence with Artemis. Cruithne is not shrinking despite the fact it should have been torn apart by Artemis's gravitational influence and close proximity to Earth, and traces of strange materials have been found on Cruithne.

Cruithne cannot be colonized due to it's heavy gravitational pull and you know the rest.

Geological Information
While the surface of Cruithne is impossible to understand, it's interior can. Evidence suggests Cruithne is hollow and possibly artificial, as traces of steel beam-like structures have been seen crashing to Artemis's surface usually on the area Cruithne tears apart. Only twelve have been recovered successfully and have concluded Cruithne may not be natural.

Written Information
Cruithne is an Irish name that refers to the early Picts, and is a variant of Cruthin. It is also named after 3753 Cruithne, an asteroid that is 1:1 with Earth's orbit allowing it to perform a quasi-satellite orbit.