Sighting in Vailly-sur-Sauldre, September 10, 2010

A witness saw a luminous phenomenon moving across the sky on several occasions and filmed it. All of the video footage was examined during the investigation.

The witness perceived the light as drifting slowly against the trees. According to the GEIPAN, this effect came from the high magnification used, with the zoom probably set to its maximum: at that scale, the Earth's rotation, which cannot be perceived with the naked eye, becomes visible.

The case showed little strangeness and good consistency, thanks to the many video clips. The images shot in daylight, at sunset, matched the planet Venus. Those shot at night matched either the planet Jupiter or the ISS. The sightings were therefore a series of astronomical misidentifications, and the case was classified A.