Sighting in Eybens, September 10, 2010

In the evening, at 8:49 pm, a witness at home noticed a luminous phenomenon moving silently across the sky. There was only one eyewitness, but the account was of good quality, and the sketch they provided included precise geographical landmarks.

The investigation concluded that the sighting had two parts, probably resulting from different misidentifications. The first part is explained by the passage of the International Space Station (ISS), which on its own would point to a classification of A. For the second part, investigators put forward two hypotheses: an aircraft with its landing lights on, or a perceptual illusion in which the witness saw two straight segments instead of an arc. Neither could be confirmed, and both remain weak.

The case was considered consistent but of low strangeness, since it can be fairly well explained by known phenomena. Because of the uncertainty over the second part, GEIPAN classified it B: probable sighting of the ISS.