Object seen in sky as a star during daylight was photographed as a flying triangle

This event ocurred, as best I can remember, between 1958 - 1961. This event was reported in, and included a photograph on the front page of, either The Tennessean or the now defunct Banner newspapers in Nashville, Tennessee. The Tennessean bought out the Banner, existing archives could be researched through The Tennessean. My Mother and I were riding in her car. The day was bright and cloudless. As we were driving along, we saw an object appearing motionless very high up in the noon sky. It simply looked like a star that had come out during daylight - just a pin point of silver in the blue sky. We watched it for about 15 minutes. We were not alarmed, only curious. The following day, my Mother showed me the newspaper. We were not the only people who saw it. The paper reported a "flying triangle" and a photo of a arrowhead-shaped object against the black of space was pictured on the front page. I've put it out of my mind for years. The more I read of triangle shaped UFOs, the more my memory was jogged about the "flying triangle" reported in the newspaper with that photo that my Mother and I saw when I was very young.
Date is approximate.  We have requested more information about the interesting incident from the witness.  PD