Using laws of reflection and refraction we know that the image on the helmet will be distorted. Since the distortion meaning we could not determine distance. What we can determine though is that whomever itis, they are wearing a white suit with a reflective visor or a space suit
Please, read the whole text carefully, @kryzsec. It's the orientation of a torso with a camera that indicates someone else made this shot and not the man from reflection.