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Hi all, Thank you for all the answers. It appears you are right. The rock is not fixed to the firmament with 4-dimensional bolts after all. I tried moving the asteroid with my RCS, and it does in fact move the rock. I suppose I could have tried that before posting. Doh... Sorry.

Hi, So I caught my first asteroid today, but only to discover I wont budge. When I make a waypoint and fire up my engines, the delta-V meter on the naveball doesn't move a single tenth of a m/s, even when I give my engines full throttle for some time. It's a class C @ 30 tons. My grabbing vessel is weighing 5 times as much and moved just fine up until the point where I attached it to the rock. I'm thinking part of it could be because my engine exhaust hits the rock making the entire system like a man blowing on the sails of his own sailboat, but even if that was at play, I should still see move movement, right...? Well I don't. Are some asteroids bolted to the firmament in an extra dimension we can't perceive? Or did I do something wrong? Here's a screenshot of the thing: https://photos.app.goo.gl/vD7ZYohDKMoBMdSq9