Project 10073 Record: Incident #28, Idaho, 24 June 1947

This document contains records and correspondence related to Incident #28, a UFO sighting reported in Idaho on June 24, 1947. The witness, identified as a Lieutenant Governor, described a stationary, comet-like object in the western sky. The report includes a Project 10073 record form, which classifies the object as an astronomical phenomenon. Subsequent analysis by the Air Weather Service and Dr. Hynek suggests that the sighting was likely the planet Saturn or Mercury, noting that a bright planet viewed through thin cirrus clouds could produce a comet-like impression. The document also includes administrative correspondence between the Air Materiel Command and the Air Weather Service regarding the investigation of sightings under Project SIGN. This correspondence outlines the process for identifying potential weather balloon sightings and includes lists of incident numbers for further study. The document concludes with an evaluation index from the Project GRUDGE report, categorizing various incidents by their probability of being astronomical, balloon-related, or unexplained.