Flying Ring UFO Sighted in Montreal 1951

Summary

In November 1951, a witness in Montreal described a ring-shaped aerial object appearing in the sky. The observer, an amateur astronomer, noted how the object moved silently at high speed, with changing colored lights and an appearance unlike conventional objects. The report includes details such as a glowing ring with an estimated temperature of thousands of degrees, suggesting unknown technology. The object made a sharp turn before disappearing, and the witness speculated others may have seen it, though no additional confirmations were found.

The report includes triangulation calculations to estimate the object's size and altitude, based on visual reference points and time measurements. Although several explanations were considered, such as meteors or balloons, the author concluded it was a "SPHEREANNO," a term that appears to refer to an unusual aircraft design. The document, classified under Project 10073, did not reach a definitive conclusion but highlights the accuracy of the observations and the unusual nature of the phenomenon.