Objects with big dimensions are not centered when their dimensions is decreased I have problem with dimensions of some objects that i download. For example this one, downloaded as .obj file.

When i import it in Blender i see that it has very big dimensions:



After this i press S and i am decreasing its scale so i can get real dimensions.
But after i decrease its size object is not centered. I tried with Shift+Ctrl+Alt+C to center the object but with no success.



I tried searching for object margins but couldn't find them. I need to  be sure that object is centered and there is no margins around the visible are.
Thanks in advance.
When importing obj, set the Transform Clamp Size to 0.01 or 0.001 and import it.

Set the object set Origin.