AISS-UFOB-346-55 — 1955-10-02 — Vermillion, South Dakota

On 2 October 1955 at 0045Z a civilian observer at Vermillion, South Dakota reported an unidentified object. The observer completed ATIC Form 164 indicating the object was bright against a pitch-dark sky with many stars visible. No optical aids were used (no binoculars, telescope, or theodolite). The 4602D AISS logged the report but no investigation was initially authorized; the Form 164 was sent to the observer on 5 October 1955.

extracted via: llm_subagent_v1