Sighting in Saint-Coulomb, May 29, 2008

The witness reported several sightings of luminous phenomena in the sky, including one on 29 May 2008: a yellowish-white ball of light that moved silently. In fact, they described two phenomena, both easy to identify.

The first was stars that seemed to change colour. The investigation attributed this to ordinary twinkling caused by high-altitude winds, an effect that depends on the weather that day and can be more or less pronounced. The second, the bright ball of light, was most likely the International Space Station (ISS), which crossed the sky over Brittany at the time the witness gave, as the Calsky pass document in the file shows. The report was sent on 30 May and referred to "last night", so the sighting did take place during the night of 29 to 30 May 2008.

Because the account lacks precision, GEIPAN considers this explanation very probable but could not confirm it with certainty. The case is classified B: probable sighting of the ISS.