Help keeping sprite attatched to ridgidbody.

I have a 2D pixel art circle with a triangle that I want to have spin around it, then when it is ready to be launched I want the whole object to launch forward. Right now the rigidbody and attached triangle launch forward but leave the circle sprite behind. How can I fix this? What is the standard practice way to move a component with a rigidbody that is not directly attached to it?

I separated the circle from the ridgidbody2D because I wanted to keep the circle from moving when the triangle is spinning.

Currently I have a game object that contains the script that controls movement then childed under that I have the rigidbody and the circle sprite, childed under the rigidbody is the triangle. Here's an image of the hierarchy - https://imgur.com/a/78ullue

 

This was the solution I came to. I don't know if correcting the position every update is the best solution, if you know of a better one please let me know.

Code (CSharp):

1.     public void LateUpdate()
2.     {
3.         transform.position = body.transform.position;
4.     }

 

You could use a joint to attach the objects to each other.

 

Thanks, would I have to attach a physical object to it? I couldn't figure out a way to attach just a sprite with a joint.