Project 10073 Record Card — Sighting in Mesa, Arizona, 4 June 1963

This document contains a Project 10073 record card and associated correspondence regarding a UFO sighting in Mesa, Arizona, on 4 June 1963. The witness, a 52-year-old male described as a very reliable local business owner, reported observing a single object at dusk for approximately 25 minutes. The witness described the object as cigar-shaped or like an elongated silver dollar, brown in color with a silver propeller-like feature bisecting the body. The object was observed using binoculars, which brought the object closer but did not increase its size. The flight pattern was described as floating or gliding in a straight path, moving gradually to the southwest. The witness provided a hand-drawn sketch of the object. The official investigation concluded that a 'Sun Dog' was the most probable cause of the sighting. Supporting documentation includes meteorological data (adiabatic charts) from the Tucson International Airport for the relevant dates, as the Air Force sought to rule out weather balloons or other atmospheric phenomena. The file also includes a memorandum from the Data Processing Division of the Air Weather Service to the Aerospace Technical Intelligence Center, confirming the transmission of rawinsonde observations to assist in the evaluation, with copies sent to Dr. J. Allen Hynek.