Yes... or maybe better would be to monitor whether or not the orbital parameters for any particular object are changing over time. If they're still using the io

Yes... or maybe better would be to monitor whether or not the orbital parameters for any particular object are changing over time. If they're still using the ion thruster they're not on station... It would take a fair bit of work on making the heuristic robust, so I don't plan to do it. If you're interested in doing so feel free to download the source (just scrape it from the website) and go at it.