arcgis desktop - Finding coordinates of raster centroid?

How do I find the coordinates of the centre / centroid of a raster?

I have tried Zonal Geometry but this does not give me the coordinates.

I need to find the centroids of two rasters and create points and measure the distance and bearings between them. i.e. distance and direction between two raster centroids.

I am using ArcGIS Desktop 10.2.