Seine-Saint-Denis, France · 2015-05-04 · from the GEIPAN archive
On May 4, 2015 (the witness confirms the date) at around 4 a.m., a witness waking up is intrigued by the passage in the sky of a triangular shape suggested by the presence of lights at the corners. The object passes at a right angle in front of his terrace, at the height of an aircraft flying at low altitude. The witness hears the noise of an aircraft flying at low altitude. No other testimony is collected. This observation case describes a phenomenon having many characteristics of an aircraft: fixed white-yellow lights, and flashing red and white lights, apparent size and noise. But the witness, who does not distinguish any fuselage or wings, gives it a triangular shape, which makes him find this craft strange. When an observer sees a set of luminous points, it is common for him to interpret this set of points as an object simply bounded by these luminous points. This illusion, called shape or contour illusion, occurs on lights independent of each other (case of Thai lanterns) and also on aircraft in cases where the wings are poorly visible: the witness then reconstructs a black volume bounded by the visible lights. If the witness did not see the wings or fuselage of the aircraft, it may be because his viewing angle did not allow it (wings seen edge-on), or more probably because the aircraft itself was very dark in color, as are for example large military transport aircraft. The axis of one of the runways of Le Bourget airfield passes directly through Epinay-sur-Seine (7.5 km away). The Météociel report notes a southwest wind recorded at Roissy: aircraft therefore take off toward the west in the direction of Epinay (see the Météociel report. GEIPAN classifies this case in category B: probable observation of an aircraft. Unfortunately GEIPAN did not process this observation case quickly enough to be able to check with air traffic control whether there had indeed been a flight at that time.
What stood out: a triangle shapepilot witness
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both described pilot witness · a triangle shape · 56 km away
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both described pilot witness · a triangle shape · 11 km away
On January 4, 2010 at around 7:45 p.m., a witness out for a walk is intrigued by the east-west movement of a large dark triangular shape with dim yellow-orange glowing circles at each end. T…
both described pilot witness · a triangle shape · 31 km away
On the RN12 between Jouars-Ponchartrain (78) and Garches (92), on October 26, 2011, around 7 p.m., a motorist and his son were intrigued by the presence in the sky of luminous points, either…
both described pilot witness · a triangle shape · 45 km away
In the night of February 23 to 24, 2016, around midnight, several people in cars are intrigued by the passage at very low altitude of an imposing object with lights of different colors, eith…
both described pilot witness · a triangle shape · 112 km away
On November 13, 2015 at around 10:15 PM, two people in a car are intrigued by the low-altitude passage of a triangular object whose shape is outlined by three steady white round lights. Two …
both described pilot witness · a triangle shape · 371 km away
On December 28, 2014 at 6:20 PM, a passenger in a car is intrigued by the presence of two fixed, parallel lights in the sky. When the lights fly over the car, the witness notes through the p…
the accounts read alike, found by meaning rather than by shared details
On Tuesday, October 22, 2013 at around 7:50 p.m., a motorist is intrigued by an object in the sky. The witness describes an object of triangular shape, made up of three luminous points, red,…
the accounts read alike, found by meaning rather than by shared details
On October 14, 2015, at around 1:25 a.m., a witness was awakened by a deafening noise outside and observed through the bathroom window the passage of a white luminous sphere, describing two …
the accounts read alike, found by meaning rather than by shared details
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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.
Anomaly