CORROBORATED
CF-GEI-19800301696 CORROBORATED
The Authon-du-Perche Gendarmerie Observations
CASE FILE — CF-GEI-19800301696 — CASEFILES CLASSIFIED ARCHIVE
Date Date when the incident was reported or occurred
1980-03-10
Location Reported location of the sighting or event
Authon-du-Perche, Eure-et-Loir, France
Duration Estimated duration of the observed phenomenon
Approximately 1 hour 30 minutes (22:10 to ~23:40)
Object Type Classification of the observed object based on witness descriptions
light
Source Origin database or archive this case was sourced from
geipan
Witnesses Number of known witnesses who reported the event
5
Country Country where the incident took place
FR
AI Confidence AI-generated credibility score based on source reliability, detail consistency, and corroboration
85%
On the evening of March 10, 1980, five French gendarmes stationed at Authon-du-Perche reported observing multiple luminous phenomena during three distinct phases. The incident began at 21:30 when gendarmes monitoring radio frequencies heard reports of an unidentified aerial phenomenon from a motorist on the D13 highway between Les Etilleux and Nogent-le-Rotrou. At 22:10, Gendarme T1 and his wife spotted a luminous ball in the clear sky while closing shutters at the barracks. This object, described as "ten times larger than the stars," appeared orange to red in color and moved in successive jumps with periods of hovering. The gendarme alerted his chief (T2) and other officers, who all observed the phenomenon's evolutions until it disappeared.
At 22:40, four gendarmes (T3, T1, T4, T5) departed by vehicle toward Les Etilleux on the D9, then toward Coudray-au-Perche before returning. During their journey, they observed a dark red luminous mass. Upon stopping at a location called "Moulin Neuf" in Coudray-au-Perche, they witnessed what they described as an oval, silent, stationary object at low altitude. According to the police report (PV), this object had two distinct sections: the lower third displayed dazzling lights, while the upper two-thirds showed predominantly red-orange lights with red points arranged horizontally. An "aureole" or halo surrounded the entire object.
This case was originally classified as 'D' (unexplained) but was reclassified to 'A' (explained) following GEIPAN's reexamination using improved analytical software and accumulated investigative experience. The investigation involved an official gendarmerie preliminary inquiry report and a private investigation by the Groupe de Recherches Cosmographiques (GRC) of Le Mans, completed December 10, 1980, which included recorded witness testimonies and drawings.
02 Timeline of Events
21:30
Initial Radio Report
Gendarmes at Authon-du-Perche hear via radio that a motorist on the D13 highway between Les Etilleux and Nogent-le-Rotrou reported seeing an unidentified aerial phenomenon. Several gendarmes scan the indicated sky direction but observe nothing.
22:10
First Phase Begins - Barracks Sighting
Gendarme T1, while closing bedroom shutters at the Authon-du-Perche barracks, spots a luminous ball with his wife in the clear sky toward Les Etilleux. He alerts his chief (T2) and other gendarmes. All observe a sphere or disk-shaped object changing color from bright orange to red, moving in successive jumps with stops. Stars are visible in the observation direction.
22:10 - ~22:35
Collective Observation from Barracks
Multiple gendarmes, including the chief using binoculars, observe the phenomenon's evolutions until it disappears. Exact end time not recorded in police report. GEIPAN analysis determines this was almost certainly the planet Venus setting low on the horizon, distorted by atmospheric turbulence and optical effects.
22:40
Second Phase - Mobile Pursuit Begins
Four gendarmes (T3, T1, T4, T5) depart by vehicle toward Les Etilleux on the D9, then toward Coudray-au-Perche. During transit, they observe a dark red luminous mass. Insufficient data recorded for analysis.
~23:00
Third Phase - Moulin Neuf Observation
Vehicle stops at lieu-dit 'Moulin Neuf' in Coudray-au-Perche commune. Four gendarmes observe an oval, luminous, silent, stationary object at low altitude. Described as having two sections: lower third with dazzling lights, upper two-thirds with red-orange lights and horizontally-aligned red points, surrounded by an aureole. No other witnesses found in area despite searches.
~23:40
Return to Barracks
Gendarmes return to Authon-du-Perche. No additional observations recorded.
December 10, 1980
Private Investigation Report Published
Groupe de Recherches Cosmographiques (GRC) of Le Mans releases investigation report including recorded witness testimonies and drawings. GEIPAN notes contradictory elements and unknown collection methodology.
2010s (approximate)
GEIPAN Reexamination and Reclassification
Using improved analytical software and accumulated investigative experience, GEIPAN reexamines this case originally classified 'D' (unexplained). Astronomical analysis confirms Venus visibility and position. Case reclassified to 'A' for Phase 1 (Venus identification), 'C' for Phases 2 and 3 (insufficient reliable data).
03 Key Witnesses
Gendarme T1
Police officer (French Gendarmerie)
medium
Stationed at Authon-du-Perche barracks. First to spot the phenomenon at 22:10 with his wife. Participated in both stationary and mobile observations.
"Observed a luminous ball ten times larger than the stars in a cloudless sky, changing color from bright orange to red and moving in successive jumps with periods of stopping."
Gendarme T2 (Chief)
Police officer, brigade chief
medium
Commander of the gendarmerie unit. Observed through binoculars. Noted to have astigmatism which affected observations.
"Not directly quoted in available documentation."
Gendarme T3
Police officer (French Gendarmerie)
medium
Participated in the mobile observation phase starting at 22:40.
"Not directly quoted in available documentation."
Gendarme T4
Police officer (French Gendarmerie)
medium
Participated in the mobile observation phase starting at 22:40.
"Not directly quoted in available documentation."
Gendarme T5
Police officer (French Gendarmerie)
medium
Participated in the mobile observation phase starting at 22:40.
"Not directly quoted in available documentation."
T1's Wife
Civilian, spouse of gendarme
medium
Present at the barracks, co-witness with her husband during the initial sighting at 22:10.
"Not directly quoted in available documentation."
04 Analyst Notes -- AI Processed
GEIPAN's detailed reanalysis reveals this case's complexity stems from multiple distinct phenomena incorrectly conflated by witnesses. The investigation identifies critical methodological weaknesses: the gendarmerie report aggregated testimonies without distinguishing individual witness accounts, preventing proper assessment of convergence or divergence among the five observers. The private GRC investigation, conducted under unknown conditions, contains contradictory and confusing elements that further compromise data reliability.
The first phase observation exhibits classic misidentification indicators. Witnesses reported seeing a luminous ball "ten times larger than the stars" in a clear sky where stars were visible, yet failed to identify Venus despite its prominence. The planet was setting low on the horizon during the observation window, creating ideal conditions for atmospheric distortion. GEIPAN's analysis confirms Venus was "perfectly visible" that evening. The reported color changes (orange to red), apparent movement in jumps, and exaggerated size are consistent with autokinetic effect (group-induced illusion of movement when staring at a stationary point source), atmospheric turbulence affecting low-angle observations, and optical aberrations. Witness T2's astigmatism and improper focus when using binoculars contributed additional distortions. The credibility of these gendarmes as observers is undermined by their failure to recognize one of the brightest objects in the night sky, raising questions about their astronomical knowledge and observation protocols.
05 Theory Comparison
BELIEVER ANALYSIS
SKEPTIC ANALYSIS
Phases 2 & 3: Insufficient Data Prevents Analysis
GEIPAN classifies the second and third observation phases as 'C' - insufficient reliable data. The second phase (dark red luminous mass during vehicle transit) lacks basic observational data: azimuth, elevation, angular size, and duration. The third phase (oval object at Moulin Neuf) suffers from aggregated testimony that masks individual witness discrepancies, contradictory elements in the private investigation report, and absence of corroborating witnesses despite the claimed low altitude and conspicuous appearance. Without individual witness statements, angular measurements, reference points, or independent confirmation, these observations cannot be meaningfully analyzed. They may represent additional astronomical misidentifications, conventional aircraft or ground-based light sources viewed under poor conditions, or observer fatigue and expectation bias following the initial misidentification.
Cascade Effect of Initial Misidentification
The entire multi-phase incident may represent a cascade effect where an initial misidentification (Venus) primed the witnesses to interpret subsequent ordinary stimuli as anomalous. Once the gendarmes convinced themselves they had observed something extraordinary, confirmation bias and heightened vigilance would cause them to misinterpret common lights during their vehicle pursuit. The lack of other witnesses in the supposedly traversed localities, despite claims of low-altitude, conspicuous objects, strongly suggests the later observations were either misidentified distant lights (perhaps from farms, vehicles, or towns) or psychological artifacts. The aggregated testimony methodology prevented documentation of individual differences that would reveal the subjective and inconsistent nature of the observations.
06 Verdict
ANALYST VERDICT
GEIPAN's conclusion is well-supported: Phase 1 represents a high-confidence misidentification of Venus under poor observational conditions, compounded by group psychology and optical factors. This classification 'A' verdict is appropriate and demonstrates how even trained law enforcement personnel can misidentify familiar celestial objects when viewing conditions are unfavorable and astronomical awareness is limited. Phases 2 and 3 remain unresolved due to insufficient data quality, not because they represent genuine anomalies. The case's significance lies not in unexplained phenomena but as a textbook example of how multiple factors—atmospheric conditions, observer psychology, inadequate investigation methodology, and lack of astronomical training—can transform ordinary observations into seemingly extraordinary events. The reclassification from 'D' to 'A' demonstrates the value of systematic reexamination with improved analytical tools and highlights the importance of individual witness documentation rather than aggregated reports.
AI CONFIDENCE SCORE:
85%
07 Community Discussion
VIEW ALL >// NO COMMENTS YET
Be the first field agent to contribute analysis on this case.
08 Live Chat 1 ROOM
ENTER LIVE CHAT
Real-time discussion with other field agents analyzing this case.