I would like to be able to estimate roughly how long it takes for a 1U cubesat using a permanent magnet for passive control to detumble after the deployment at about 550 km.
Assuming there is some flexibility on size and shape of the magnet compatible with a 1U cubesat, can I expect a transition from tumbling to general alignment (with rocking) in a few hours, days, or not for months?
Are other passive damping systems necessary to include along with the permanent magnet?