Using our own Earth and Moon as a template is it possible for a second large body (One quarter to a third of the Moon’s Size) drifting close by to be captured in a stable and permanent orbit? Can we predict what that orbit would look like? The mass of the object is irrelevant, whether it sits slightly closer or further away from the existing moon is also irrelevant, all that matters is that the orbit be stable and that the body be large and visible enough so that anyone on the planet surface that is effected can clearly see where the blame lies.