Yes, it is possible to get a DSO image from a Dobsonian scope without an equatorial platform for tracking, but I wouldn’t want to have to do it too many times! lol.
Keeping the object in the field of view is tough. Dealing with hundreds of images and only 25% are usable is a pain. Plus, you have to manually pick and sort them, which is even worse. And after all that effort, you get such meager results like the above? Yeah, like I already said… I wouldn’t want to do this more than I have to. 🙂