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The original over-sized docs from the Blue Book Archive site are listed below. Searchable text versions are provided further below.
Page ID (PID) NARA-PBB85-566-568
Collection National Archives (NARA)
Roll Description NARA Blue Book Roll 85
Document Code T1206-85
MARCH AFB - 23 September 1951
On 23 September 1951 at 0810 PST, an unidentified object was sighted over Long Beach, California. Four F-86 aircraft were scrambled arid the object was sighted by then over Muroc, California. On attaining an altitude of 43,000 ft. the F-86's reported the object to be orbiting March AFB at an estimated altitude of between 50,000 ft. and 55,000 ft. The object appeared to be a swept wing, fighter type aircraft. -
Unavailable at this time.
Status of Investigation
Radiosonde balloons were released from San Diego, Long Beach and Santa Maria, California at approximately 0700 PST. All of these weather stations were checked by OSI personnel and although the balloons were released all weather station personnel stated that it would be very doubtful if their balloons could have traveled the course that the object traveled.
All of the major aircraft factories and installations conducting ex- perimental flight tests were contacted. No experimental aircraft airborne at the time of the sighting.
Additional information has been requested as to additional details of the incident such as times and locations during the attempted interception by the F-86's and other possible balloon launchings.