I just learned about Dyson Trees[1] recently. Could this be related? (Layman asking serious question)
More likely it's water or sulphur. I think we may be in for a big "Ceres is volcanically (could by cryovolcanism) active" shock, given the lack of cratering they've also observed.
It's a decent size, its composition is only hypothetically known, it may have more latent heat than we expect. If so, it's extremely exciting news, as it means it's not quite the inhospitable cold, dry, rock we expected.
I'd go.
Perhaps there'll be a little sign there saying "all these asteroids are yours, except Ceres."