AnomalyOn September 17, 2012 at 2:20 PM, a witness notices in the sky a black ball that seems stationary. The witness observed in the sky this black object appearing motionless, fairly low on the horizon. He goes around it, over a quarter turn, which proves the short distance and altitude of the object. The north wind of 10 to 20 km/h (see record) seems too weak to fly a kite. The spherical shape suggests rather a balloon. The cloud cover seems unsuitable for a hot-air balloon test (heated by the sun). It is probably a festive balloon inflated with helium, held by a string (of course invisible beyond 100m) or flying in the weak wind of that day. GEIPAN classifies this case "B": probable observation of a balloon.
Marne, France · 2012-09-17 · from the GEIPAN archive
An account in Marne, France
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This is an official case file of GEIPAN, the French space agency's unidentified aerospace phenomena office, machine translated from French. The original text and the full investigation file are at geipan.fr. We reproduce it with thanks and remove anything on request.