The study also found something unusual. It is highly reflexive and potentially 10 times higher than solar system comets. But it is not clear that this is the cause. It would have lost a lot of dust and dirt on the surface as Oumuamua passed near the sun. It was covered with snow and ice combined with the gas of the object itself. This is not necessarily until this extent, but occurs in the local comet.
There is an important issue in verifying details. It may be too late. The object is now as far away from Saturn as the sun, and is far too far away to study with the current space telescope. Whatever the exact nature, we may have to wait a long time to get more answers.