On February 9, 2015, between 8:00 PM and 11:00 PM, a witness observed a "strange" star that they described as motionless, red, green, and blue. The long observation (one hour) of a fixed object in the sky, having the appearance of a star, points to a distant astronomical phenomenon. The witness indicates the direction of Clayrac (azimuth ~ 165°) or Prayssas (azimuth: 142°). On the attached sky chart, one notes the star Sirius, the brightest star in the night sky, visible at azimuth 143° at 21° elevation. The appearance described by the witness: color changes of green/red/blue, vertical or horizontal oscillations, is entirely consistent with the artifacts produced by scintillation caused by the atmosphere (see: a star?) and by a visual perception illusion called the autokinetic illusion (see: the perception of movement of a point of light in the sky.) GEIPAN classifies this case "A": observation of the star Sirius.
Lot-et-Garonne, France · 2015-02-09 · from the GEIPAN archive
An account in Lot-et-Garonne, 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.