I am contemplating taking a picture of a subject from a different angle until I reach a complete circle. As for the frequency, let's assume something from the range of one photo every 1 degree (that would be an exhausting 360 photos) to something like every 10 degrees. I have seen photographers do this and the results are very cool. The go-to advice for this is to find a physical circular object outside to walk alongside.
Assuming we don't have a circular object just laying around in our backyard, what is another viable approach to getting the most accurate circular path to walk alongside as you take shots of your subject over 360 degrees?
subject: motorcycle (large and heavy)
If tethering with a string, I'd need a way to hide the string from the shots
I want the subject to remain still and I want the background to change
Tie the string to the object in the centre, or peg it into the ground etc. Tie the other end onto your camera or tripod leg.
Then you can keep the string taut, as you move around in a circle. It will keep the camera a fixed distance from the centre.
If the object is not too large, put it on a turntable of sorts, and turn it instead of the camera. That way you can even put a solid background behind it and get consistent background and lighting for all the shots.
If the object is large enough that turning the object is not viable, then the string idea works, even if it's just to mark a circular track around the object rather than attached to the camera/tripod.