Watched diamond shaped object which was motionless except for earths rotation for about one hour.

It was a warm clear day with a haze on the horizon.  The kids were playing in the front yard and I had sat down on the front porch step to watch them.  It was 16:00 hours and clear.  I noticed a bright diamond shaped object at about 2:00 oclock angle in the western sky.  I was facing west. I got out my Mimia 35 MM camera and tripod.  I put on a doubler and my 200 MM telephoto lens.  I took 7 photos of the object which had no movement other than the rotation of the earth taking it downward out of the cameras field of view. It finally dissappeared in the haze near the horizon.  My house was in a deep valley, so the sun was below the top of the  hill and the object,to the West.  I still had the 35MM slides. I made an elargement of one of the slides by projecting it about 40 feet onto a ground glass plate and photographing it from the back.  The original images are so small it is hard to see any detail.  This thing was out in space, beyond the atmosphere, I think.
Witness indicates that the date of the sighting is approximate.  PD