An account in Seine-et-Marne, France

On Sunday, July 27, 2014, around 5:30 p.m., a witness observes a passenger plane, then a black disk, smaller, moving in the opposite direction of the plane and more slowly. The disk becomes oval and flattens out completely as it moves away. Only one testimony is collected. The observation, against the light, of a black object crossing the sky in a straight line in a few minutes first suggests a balloon carried by the wind. The Météociel report indicates a West to Southwest wind consistent with the eastward movement reported by the witness. What the witness saw must be a motorized object: possibly a small circular drone (like a quadcopter) below 100m altitude, operated by someone at the leisure center, or a helicopter at relatively high altitude, or even a plane as large as the one the witness observed, but 4 times farther away. Verifying any of these hypotheses, though compatible with the observation, is however almost impossible. GEIPAN classifies this case "C": lack of information or cross-checking. N.B. The witness got the date wrong in his account: he writes "Sunday, July 28," while Sunday is the 27th. The weather on 7/27 matches his description perfectly (storm at the end of the day). After verification with the witness, the observation did take place on Sunday, July 27.