The lack of atmosphere actually helps, as the spectroscopy will be more accurate. I would guess that it's a very reflective crystalline structure. You can see

The lack of atmosphere actually helps, as the spectroscopy will be more accurate. I would guess that it's a very reflective crystalline structure. You can see that as the bright structure goes beyond the terminator, it is still visible for a frame, but it completely disappears the frame after. It's hard to say either way though as we don't know the specs of the camera. Lots of materials reflect light differently at wavelengths outside our normal vision.