After Effects :: Placing Anchor Point At The Exact Centre Of A Circle-object?

Is there any way to locate exact center of a circle in after effects? I made a perfect circle in photo editing program and since layer's boundaries corresponded to circle's edges, i thought that anchor point in after effects will be exactly at the center. but it's not the case - the anchor point is at the center of a composition!
 
I imported the circle .psd layer together with other layers as a composition, does this have any importance? As i said,the circle layer boundaries corresond with circles edges, not with canvas' edges in my photo editing program. But whe i solo the circle layer, i see that the anchor point is at the center of a composition, not the layer.
 
So now i have to place anchor point at the center manualy, and it's pretty difficult to do it perfectly. when i rotate the circle, it wobbles and wobbles.