Brief sighting of a reddish triangle in Castetnau-Camblong

Summary

In July 1979, a witness in Castetnau-Camblong observed through an astronomical magnifying glass a reddish triangular object hovering motionless before fog obscured it. The sighting lasted less than 30 seconds. A tetrahedral hot-air balloon was considered but did not fully match the description. Without an exact date, balloon launches and weather conditions could not be verified, and the case was classified "C".