The fate of sub-micron circumplanetary dust grains I: Aligned dipolar magnetic fields

► Planetary magnetic fields affect the orbits of charged dust grains. ► Depending on launch distance and charge-to-mass ratio, dust grain orbits may be unstable. ► Both radial and vertical motions are studied for positively and negatively-charged dust grains. ► We find stability criteria for a range of launch conditions, with numerical and analytical methods.