Project 10073 Record — Sighting Report, Philadelphia, Pennsylvania, 25 August 1966

This document contains a Project Blue Book sighting report regarding an unidentified aerial phenomenon observed in Philadelphia, Pennsylvania, on August 25, 1966. The report includes a standard Project 10073 record form, a narrative account provided by a civilian witness, and a follow-up letter from Major Hector Quintanilla, Jr., Chief of Project Blue Book. The witness, who resides in an airport flight pattern, reported seeing a reddish, circular-to-triangular object moving rapidly toward the northeast at approximately 2055 hours. The witness noted that the object appeared to be turning away from the Philadelphia Airport and disappeared behind a building. The witness explicitly stated that no sound was heard and no other lights were visible, comparing the object to a red aircraft light. The witness estimated the altitude to be over 2,000 feet. Following the initial report to the Naval Air Station at Willow Grove, the witness completed a formal U.S. Air Force technical information questionnaire. In his correspondence, Major Quintanilla acknowledged the report but requested further information, noting that the initial data provided was insufficient for a definitive evaluation. The official conclusion recorded on the form is 'Possible (AIRCRAFT),' with the justification that no data was presented to prove the object could not have been an aircraft.