Change object origin precisely? So here is my current state:


I want to move the object origin (small yellow dot) exactly in the middle but to the right so when I mirror the object it will work correctly.

I can't figure out how to do it. I know how I can move the 3d cursor and change the objects center to match the 3d cursor.  However, I do not know how to get the 3d cursor to the exact spot.  

I know where I can input the exactly location of the 3d cursor but I don't know how to SEE the current object center so I know the proper Y/Z pair to put in.

How can this be done easily?
There a couple of ways:


Tool shelf > Tools [tab] > Set Origin > Origin to Geometry or Origin to Center of Mass (which could be the same depending on your object)
You can move the 3D cursor to any point related to the object mesh. In edit mode, snap it to any point of the object mesh, or the mean point of any selection within the mesh, like this: Shift+S > Cursor to Selected or Active or Center.  Then tab back to object mode and as in #1 ... Set Origin > Origin to 3D Cursor