ToughSF pointed Thursday the 27th to 2007's DOI 10.1063/1.2722266. No link b/c X. 50V for 50-100 Isp.
I'd consider it for docking a smol robot with some regolith of low G (like you-know-where), then moving on. Meh. Hope it's cheap anyway.
Really we should be making colonies from the dust on this rubble. The colonies refine the dust into oxygen, and into something that can react with oxygen. That offers a lot more impulse and, also, thrust. They say this might work even on our Moon. As for Bennu et al. I'd just scoop it all and move it somewhere less dangerous.
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