Mysterious Orb in the Woods

During an afternoon hike and some mountain climbing in the summer of July 1993, the above picture was taken from the top of a large rock cliff.  Attempting to capture a picture of the scenery, I snapped this picture.  In the center of the photo is what appears to be a self luminescent orb.  This was taken without a flash during the afternoon.  Sunlight can be seen in the trees, but this does not appear to be a trick of the sun or camera lens.   I did not see the anomaly at the time the picture was taken.

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