Project 10073 Record Cards and Case 200 Summary

This document consists of two Project 10073 record cards and a summary of Case 200, detailing UFO sightings in Colorado during August 1956. The first record card, dated 11 August 1956, describes a sighting in Pueblo, Colorado, where six to eight objects with a greenish glow were observed in a V-formation for one second. The objects were estimated to be the size of a half-dollar at arm's length and were noted as a possible meteor. The second record card, dated 29 August 1956, also in Pueblo, describes a single, basketball-sized orange object observed for over two hours. This object appeared reddish on the bottom and green on the top, and was eventually identified as the planet Mars. The third page provides a detailed account of Case 200, which involved sightings in Ft. Collins and Loveland, Colorado, between 24 and 29 August 1956. Witnesses described a round, intensely red object that moved slowly and occasionally appeared disk-shaped. A reporter from radio station KCOL noted the object had a constant glow rather than a pulsating one. While some observers suggested the object might be Mars, Dr. Gordon Newkirk of the University of Colorado dismissed this, noting it appeared in the wrong sector of the sky. Capt. George Sanderson of Lowry AFB also noted that the recurrence of the object over several nights made a temperature inversion an unlikely explanation. The document highlights the difficulty authorities faced in explaining these sightings, noting that checks of Lowry AFB and other installations failed to disclose any balloon releases or aircraft flights that could account for the phenomena.