I am currently reading the The Expanse novel series. In the books there are several space colonies that are basically asteroids or planetoids (in particular Eros and Ceres) that have been spun up to act as huge centrifuges for the people living "upside-down" in tunnels inside of them. The artificial gravity on the lowest levels near the surface is stated as (minus) one third of a g.
Is this feasible? Obviously, as soon as the centrifugal force exceeds gravity everything on the surface (or the surface for that matter) wants to fly off. So you need to have some inherent stability to hold things together. Are asteroids and planetoids stable enough to do that? Intuitively I would assume that bigger bodies are more solid that smaller ones.
I know about the roche limit but that is about tidal forces between two bodies not centrifugal forces acting on one body but I assume the same concepts apply here.
(I thought about asking this to the astronomy stack exchange instead but the question is ultimately about space colonization so I put it here. Feel free to move it if you disagree.)