This question is based off something I have seen in science fiction. The TV series The Expanse is known for having realistic physics when it comes to artificial gravity (i.e. no Star Trek gravity plates). Everything accelerates linearly or spins to simulate gravity (normally to about 0.3 g). However, two of the spinning bodies in the series are asteroids (433 Eros and Ceres).
If we assume we have the ability to generate enough thrust to sufficiently spin up large asteroids (and even dwarf planets), we are talking about spins generating outward forces greater than the surface gravity.
- According to Wikipedia, Eros has a surface gravity of 0.060 g. That means a rotation generating 0.3 g would be producing 5 times the asteroid's surface gravity (in the wrong direction). This would quickly quickly throw off all loss dust and rocks on the surface, but what about the rest of the asteroid? Are Eros-sized asteroids primarily held together by gravity (and therefore would spin apart)? Or has most of their mass been compacted into structure capable of withstanding such forces?
- What about dwarf planet sized asteroids like Ceres? Would something large enough to round itself before being spun up have a different fate (if Eros would not survive)?