This can even be done for some asteroids in such a way that gradually some such revised orbits become a common circle orbit with a few other big asteroids, spaced apart around their common circle orbit. Ion jets would then whenever needed slightly refine such an orbit for any possibly struck asteroid to regain the one common circle shared orbit. After all, groups of "Trojan" asteroids share the same orbit as their big parent planet, but about 1/6 of the way around the common orbit, centered 60deg before and after their parent big planet.
Then over decades or centuries, lots of asteroids could become adjusted into a common plane of different orbit radii circles around Sol. This would leave interplanetary space less cluttered with so many old varied not perfect circle tilted orbits only roughly about in the planetary disk.
Who should ever object to it costing even centuries to extremely gradually be able to adjust the orbits of even 100s of big asteroids? Robotic equipment, kept energized by Sol, would tirelessly do as programed as long as wanted.
While refining some current big asteroid orbits, many less big asteroids can have their orbits gradually shifted to eventually lightly orbit the bigger orbit adjusted asteroids. This will thus reduce independent asteroid numbers, thus nicely uncluttering interplanetary space some, becoming safer for future interplanetary space probes and vessels passing through Sol's planetary disk.
For 100-500km asteroids, if of avg. density ~3g/cc (Luna has 3.341), then their surface gravities would compare with Earth as: .43%, .86%, 1.28%, 1.71%, 2.14%. Small asteroids could orbit a 100km asteroid in 1,2,3,4,5,6,7 Earth days (or more), if above its axis by 271km, 430, 563, 682, 791, 894, 990km, (or more). Or for such wanted 1-7 (or more) day orbit radii around 200, 300, 400, 500km big asteroids, simply multiply such days orbit radii by 2, 3, 4, 5.
Thus many less big asteroids can be shifted into orbits around big asteroids, and into orbits disks parallel to Sol's planetary disk, to keep space above or below the planetary disk ever less cluttered by random asteroids, safer for interplanetary space vessels. A half dozen big asteroids can even share one common orbit, each big asteroid adjusted to orbit 60deg apart within their shared orbit around Sol. Similarly for the small asteroids orbiting in multi-day orbits around each such big asteroid. So now one orbit for a half dozen big asteroids can safely nicely accumulate over a hundred small asteroids adjusted around one major Solar orbit! And lots more big asteroids can be put in similar different radii circle orbits.
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