Continental Divide, New MexicoJanuary 1953

On the night of January 26, 1953, Air Force personnel stationed at a radar station near Continental Divide, New Mexico made one of the most striking UFO sightings of the era. A/1c J.O. Dennis, standing outside the operations building, spotted a brilliant reddish-white object about ten miles to the west, moving slowly northward. The object passed behind a hill and reappeared. At almost the same moment, the radar operators inside saw an unidentified blip on their scope, also about nine miles away and heading northwest. For the next forty-five minutes, both the radar and the naked eye tracked the object as it moved slowly across the sky at speeds between 12 and 15 miles per hour, at an altitude of 10,000 to 15,000 feet.

The Air Force investigators who filed this report considered it "the most complete report ever received by ATIC on the sighting of an unidentified object." The visual and radar observations were too closely coordinated to be coincidence. The object was tracked moving from east to west, directly into the prevailing winds aloft, which ruled out a weather balloon. An astronomical explanation, like Venus or a meteor, also seemed unlikely since the object had left a radar return in addition to being visible to the eye. The slow speed eliminated conventional aircraft.

The Air Force explored several theories. Electronics specialists suggested that weather conditions, possibly an inversion layer in the atmosphere, might have created a false radar echo at the same moment the observers happened to spot Venus low on the western horizon. But this explanation required such an improbable coincidence that the investigators gave it little credence. A radiosonde balloon (a weather balloon used to measure atmospheric conditions) released from Winslow, Arizona, an hour and fifteen minutes before the sighting, was also ruled out, both because it would have been blown in the opposite direction by the upper-level winds and because it would have burst long before the observation time.

The case file notes that final conclusions awaited weather data from Asheville, North Carolina that had been requested but not yet received. The analysts candidly admitted there was no known explanation for the observation. The full case file of 35 pages is reproduced below as held by the National Archives.