The lookat command will orient the viewpoint so that it is looking at the given coordinate. The Y coordinate of the viewpoint is translated to 1.82 and you have it lookat a point with a Y coordinate of 0, so the viewpoint will have to be pitched down a little. If you don't want the viewpoint to be pitched then set the Y value of the lookat point to the same Y value of the translation (in your case, 1.8234411478)
