Department of Defence File OLD AIR 580/1/1 pt. 25: Reports on Flying Saucers and Other Aerial Objects

This file contains a collection of reports and correspondence regarding unidentified aerial phenomena observed in Australia during 1973. The primary focus of the file is the investigation of a series of sightings reported across Western Australia on the night of April 28-29, 1973. Following inquiries with the Goddard Space Flight Centre in Maryland, USA, the Department of Defence determined that these sightings were caused by the re-entry of a Russian booster rocket (1973-024B) associated with the launch of the COSMOS 555 satellite. The department issued standardized letters to the various witnesses, explaining that the object's vividness and disintegration were consistent with a large space vehicle re-entering the Earth's atmosphere. Other reports in the file include sightings in Victoria and New South Wales, which were investigated by the Royal Australian Air Force (RAAF). These were subsequently identified as civil aircraft, specifically Cessna 402s or other light aircraft, often operating with landing lights or stroboscopic lighting that led observers to misidentify them as unusual objects. One report involving a sighting in Sassafras, Victoria, was identified as a Victorian Police vehicle. The file also includes correspondence from the Central Coast U.F.O. Research Bureau and the Astronomical Society of Victoria, demonstrating the collaborative, albeit skeptical, approach taken by the RAAF in addressing public reports. The documents reflect a systematic process of correlating witness reports with flight logs, radar data, and astronomical information to provide logical explanations for the phenomena.