After doing a little more research (without having an astrophysics degree), it seems to me that the Black Moon's originally stated position would be too close to the planet to avoid heavy volcanic activity, tidal flexing, or perhaps being pulled into the planet or ripped to pieces by tidal forces. I haven't yet made those changes to the article, but if the approvers are favorable to the idea, I would like to retcon the moon's placement to be further away from the planet.