Project 10073 Record Card — Hartsville, South Carolina, 15 Dec 52

This document is a Project 10073 record card detailing an aerial sighting that occurred on December 15, 1952, near Hartsville, South Carolina. The witness, identified as an Air Force pilot, reported observing a single circular, silver object for a duration of 10 to 15 seconds. The pilot estimated the object's size to be equivalent to a half-dollar held at a ten-mile distance. The object was observed at an altitude of 15,000 feet, traveling at a speed of 300 mph, and was noted to be oscillating while rapidly losing and gaining altitude. The report mentions that the sighting was cross-referenced with a similar report from Greensboro, North Carolina, which took place 10 minutes after the Hartsville event. The investigation noted that there was no apparent correlation between the two sightings, specifically citing that the speed involved was too high for a balloon or a jet. Despite these observations, the final conclusion recorded on the card states that the object was a conventional balloon.