Bas-Rhin, follower light reclassified as Venus

Summary

On the night of 11–12 April 1980, several witnesses in Bas-Rhin reported a light that appeared to follow their vehicle—a well-known 'follower ball' effect. Originally classified as D, the case was re-examined by GEIPAN. Analysis determined the phenomenon was Venus, visible at magnitude –4.4 and low on the horizon. The duration, direction, and disappearance of the object behind the local terrain matched the planet's characteristics. Although one witness mentioned a sudden shift north-east, the other three did not confirm it, and it was deemed a misperception. Atmospheric layers may have altered the apparent colour and movement. GEIPAN reclassified the case as A.