Board Thread:Speculation House/@comment-6490434-20130410061505/@comment-24891101-20150715041819

Though that lunar system is not at all stable, though I'm not sure of a timescale for its disintegration, since those fragments are clearly within the Roche limit. Haumea, in contrast, does not have satellites within the Roche limit.

The rotation of the moon might also give us interesting information, considering it's not yet tidally locked. This would give an upper bound on the age of Remnant's moon, though calculation would be difficult, as many things are not known.