Discussion below this answer to Why does it take so long for ISS garbage to fall out of orbit? addresses the jettisoning of the ~2.9 ton pallet full of used batteries full of nickel and other things. It seems that the object was given something like a 10 to 40 cm/sec "nudge" on its way. This means it will start at a nearly circular 400 km primarily chosen to not hit the ISS again, and atmospheric drag will slowly bring it down over months or years until it burns up in the atmosphere an produces an unknown number of nickel particles in our atmosphere (see How many kilograms of nickel particles will be dispersed in Earth's atmosphere by dumping old ISS batteries overboard?) unless Gwynne Shotwell grabs it first and brings it (and the hypothetical sensitive item I've invented for fun) safely to Earth.

But I digress.

Question: When jettisoning heavy objects from the ISS like 2.9 tons of batteries (and other things), how much torque is there on the station? How much angular momentum is added to it? Are corrective actions necessary to maintain attitude? Did the ISS' control moment gyroscopes (CMGs) speed up to a fevered pitch? Did attitude control thrusters start firing?


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