Project 10073 Record Card — La Mesa, California, 27 July 1958

This document consists of a Project 10073 record card and associated teletype communications regarding a sighting reported on July 27, 1958, in La Mesa, California. The witness, a 15-year-old, described a spherical object, approximately the size of a pea, exhibiting a burning green copper color with a bright green trail. The object reportedly made no sound, broke into two pieces, struck the earth, rose again, and then gradually disintegrated. The sighting occurred at 0555Z under clear weather conditions. The report was processed by the 751st ACWRON at Mt. Laguna Air Force Station and forwarded to the Air Technical Intelligence Center at Wright-Patterson Air Force Base. Operations Officer Capt. Harry C. McMasters noted that the sighting location coincided with the R-302 restricted area, prompting an investigation into potential coincidental military firings or drops. However, the final assessment concluded that the description was entirely consistent with a bolide or fireball, potentially related to the Perseids Delta meteor group, which the earth was passing through at the time. The file includes references to consultations with experts, specifically noted as Dr. [illegible] and Dr. Le Peg [illegible].