Advances In Space Research brings the goods this December (volume 74, Issue 11):
Abad, A. Elipe, A. Ferreira, A. F. S. Periodic orbits around 216-Kleopatra asteroid modelled by a dipole-segment Pages 5687-5697 .2024.10.017
Gu, X. Yamaguchi, K. Inamori, T. Park, J-h. Dynamics and control for spacecraft tracking a displaced orbit around an asteroid exploiting solar sail Pages 5803-5818 .2024.08.068
Asteroid (216) Kleopatra is an odd one, not round at all. The description often seen is ‘dog bone,’ an oblong shape with knobs at each end. That, and Kleopatra is a metal (M-type) asteroid, one of the larger examples. We would like to visit it someday, but how? Abad et al. study possible orbits around such a weird gravity field. Yes, there are orbits a spacecraft could take.
And, of course, a spacecraft could take nongravitational trajectories, by actively thrusting. Unfortunately, this means your thruster fuel will run out someday. But what if your ‘thruster’ consumed no fuel- it could run infinitely (such as it is)? Solar sails, like sails on Earth, are one such method. A spacecraft with a solar sail could, somehow, some way, take somewhat arbitrary orbits around inconvenient gravity fields. Gu et al. consider some ways. There has to be some navigation function, keeping things under control, and using some control laws for remaining in orbit.