Project 10073 Record Card — Kremmling, Colorado, 6 October 1957

On 6 October 1957, at 1705 local time, a civilian witness in Kremmling, Colorado, observed a stationary, round object in the sky for a duration of five minutes. The witness described the object as being the size of a quarter held at arm's length. Initially appearing red, the object changed to blue with a white core and exhibited two tails, which the observer likened to those of a comet. The object eventually faded from view. The observation was made using binoculars. Official documentation, including a Project 10073 record card and subsequent teletype communications, indicates that the sighting was investigated by the Air Technical Intelligence Center (ATIC). Meteorological data provided in the report noted scattered clouds and good visibility. The final assessment concluded that the object was likely a weather balloon that had been released from Grand Junction, Colorado. The teletype correspondence confirms the transmission of these details between various Air Force commands, including the Air Defense Command and the 34th Air Division Defense at Kirtland Air Force Base, under the classification of unclassified.