The Apollo Constellation Engine (ACE) is a small ion thruster developed for smallsat constellations. I made this for someone based off some photos and guessing, so dimensions are most likely not that accurate. Also didn't put in the actual fittings (no reason to print a high fidelity Amphenol on a representative model). Some people also called them ASE (Astra Space Engine...hold on they are pronounced the same?) which some people find disrespectful. I have no stake in this and just put it in here so it's more easily searchable.

It is not actually radioactive.