UFO/UAP Sighting Reports: January – December 1958

This document is a comprehensive, chronological compilation of Unidentified Aerial Phenomena (UAP) sighting reports recorded throughout the year 1958. The data is presented in monthly tables, detailing the date, location, observer, and official evaluation for each incident. The reports span a global range, including sightings in the United States, Japan, Europe, the Middle East, and South America. Each entry provides a brief assessment of the phenomenon, with common classifications including 'Insufficient Data', 'Aircraft', 'Astro (Meteor)', 'Balloon', and various 'Other' categories, such as 'Ground Light', 'Satellite', or 'Unreliable Report'. The document also includes sections for 'Additional Reported Sightings (Not Cases)', which list events sourced from news clippings, maps, and correspondence that were not subjected to the same formal evaluation process as the primary list. The records reflect a wide variety of observers, ranging from military personnel and radar operators to civilian pilots, ship crews, and the general public. The document serves as a historical record of the volume and nature of UAP reports processed during 1958, highlighting the diverse range of phenomena that were being tracked and evaluated by official channels at the time.