Automatic panning for orthographic camera

Hi again!
Another thing with orthographic camera.
I would like to automatically pan an orthographic camera to a specific location in the 3D world (an object position for instance), WITHOUT changing its orientation, i.e. the same way as when I pan it manually with my mouse.
The “tween camera” puzzles would do that if only I knew from which camera position I start with its associated target, to the desired destination camera position point with the new target (the desired object)…
Does anyone know how to do that??
Thanks!