Sun through fog mistaken for a UFO in Pithiviers, 1981

Summary

On 24 January 1981 a witness in Pithiviers saw a yellow ball spinning in the sky, moving from north-west to south-east before vanishing. The testimony was deemed sincere. However, later analysis suggests the object was the Sun seen through fog — an optical effect that can be deceptive in poor atmospheric conditions. GEIPAN reclassified the case as A after review with updated tools.