UNRESOLVED
CF-GEI-20130508459 UNRESOLVED
The Ménil-Hubert Pebble-Shaped Object
CASE FILE — CF-GEI-20130508459 — CASEFILES CLASSIFIED ARCHIVE
Date Date when the incident was reported or occurred
2013-05-29
Location Reported location of the sighting or event
Ménil-Hubert-sur-Orne, Orne, Basse-Normandie, France
Duration Estimated duration of the observed phenomenon
1 minute
Object Type Classification of the observed object based on witness descriptions
other
Source Origin database or archive this case was sourced from
geipan
Witnesses Number of known witnesses who reported the event
1
Country Country where the incident took place
FR
AI Confidence AI-generated credibility score based on source reliability, detail consistency, and corroboration
85%
On May 29, 2013, at 23:45 (11:45 PM), a motorist driving near Ménil-Hubert-sur-Orne, France, observed an unusual aerial phenomenon at several dozen meters altitude. The witness described a dark, pebble-shaped (galet-shaped) object with two red lights, one positioned at the front and one at the rear. The object moved slowly in a linear trajectory toward the northwest before disappearing behind a hedge. Throughout the approximately one-minute observation, the witness heard a high-pitched buzzing or humming sound accompanying the object.
The case was officially investigated by GEIPAN (Groupe d'études et d'informations sur les phénomènes aérospatiaux non identifiés), France's official UAP investigation service operated by CNES (Centre National d'Études Spatiales). The witness initially reported the date as May 30 in their questionnaire but corrected it to May 29 during the investigation. GEIPAN noted the witness provided a relatively brief description of the event, and no photographic or video evidence was obtained.
GEIPAN classified this case as D1 - unexplained with medium strangeness and good consistency. The investigators noted that the pebble shape reported is unusual in UAP reports and does not correspond to classic misidentification cases. While the witness's sincerity was not questioned, the case's consistency is considered moderate due to the single-witness nature, lack of physical evidence, and somewhat summary description. GEIPAN concluded that additional witness testimony would be needed to either explain the phenomenon or strengthen the case.
02 Timeline of Events
23:45
Initial Sighting
Motorist observes a dark, pebble-shaped object hovering at several dozen meters altitude with two red lights visible at the front and rear.
23:45:15
Object Begins Movement
The phenomenon begins moving slowly in a linear trajectory toward the northwest. A high-pitched buzzing or humming sound is audible throughout the observation.
23:46
Object Disappears
After approximately one minute of observation, the object disappears from view behind a hedge, moving in a northwesterly direction.
2013-05-30
Initial Report Filed
Witness files report with GEIPAN, initially indicating the date as May 30 (later corrected to May 29).
2013-06
GEIPAN Investigation
Official investigation conducted by GEIPAN. Investigators note the unusual pebble shape and conclude the case does not match classic misidentification patterns.
Investigation Conclusion
D1 Classification Assigned
GEIPAN classifies the case as D1 (unexplained) with medium strangeness and good consistency. No conventional explanation identified.
03 Key Witnesses
Anonymous Motorist
Civilian motorist
medium
Driver traveling near Ménil-Hubert-sur-Orne on the evening of May 29, 2013. GEIPAN investigators found no reason to doubt the witness's sincerity, though the description provided was relatively brief.
"GEIPAN noted: 'Il n'y a aucune raison de douter de la sincérité du témoin' (There is no reason to doubt the witness's sincerity)"
04 Analyst Notes -- AI Processed
This case presents several notable characteristics that distinguish it from typical misidentification scenarios. The pebble-shaped morphology is uncommon in UAP databases, where spheres, triangles, disks, and cigars dominate reports. The symmetrical placement of red lights at both the front and rear of the object is also atypical - conventional aircraft typically display different colored lights (red/green navigation lights, white strobes), and most drones of the 2013 era would not match this configuration. The accompanying high-pitched buzzing sound suggests some form of propulsion or mechanical system, though the sound character doesn't clearly match common aircraft or drone acoustics.
The official GEIPAN assessment characterizes this as having 'medium strangeness' - not extraordinary enough to be clearly anomalous, but unusual enough to resist conventional explanation. The witness credibility appears solid; GEIPAN investigators found no reason to doubt their sincerity, though they noted the description was somewhat limited in detail. The slow, linear movement pattern is less dramatic than many UAP reports but doesn't definitively indicate any specific conventional explanation. The D1 classification by GEIPAN indicates they could not identify the phenomenon despite investigation, distinguishing it from the more ambiguous D2 category (insufficient data) or the explained A/B categories.
05 Theory Comparison
BELIEVER ANALYSIS
Genuine Unknown Technology
The unusual characteristics - particularly the uncommon pebble shape, symmetric red lighting configuration, accompanying buzzing sound, and slow controlled movement - could indicate technology not matching conventional 2013-era aircraft or drones. The fact that a professional government agency (GEIPAN/CNES) investigated and classified it as unexplained (D1) after ruling out standard explanations adds weight to this possibility. The object's behavior suggests intelligent control rather than natural phenomenon, yet doesn't match known human technology patterns of the time.
SKEPTIC ANALYSIS
Experimental or Civilian Drone
The object could have been an unconventional drone or experimental aerial vehicle, possibly explaining the unusual pebble shape and buzzing sound. By 2013, consumer drones were becoming more common, and some enthusiasts were experimenting with custom designs. The red lights might have been navigation or orientation LEDs, and the high-pitched sound consistent with electric motors. The slow, linear movement pattern matches typical drone flight characteristics. However, the symmetric front-and-rear red light configuration is atypical for 2013-era drones, and most would have been smaller and lower-flying.
Misidentified Conventional Aircraft
Despite GEIPAN's assessment, a possible explanation could be a small conventional aircraft or ultralight seen from an unusual angle at night, with the pebble shape resulting from perspective distortion or limited visibility. The red lights could be navigation lights, and the buzzing sound from the engine. However, this theory struggles to explain several specifics: the unusual symmetry of the lights (aircraft typically have red and green navigation lights, not two reds), the described pebble shape, and GEIPAN's explicit statement that it doesn't match classic misidentification patterns.
06 Verdict
ANALYST VERDICT
This case remains genuinely unresolved. The pebble-shaped morphology with symmetric red lights and accompanying buzzing sound doesn't match standard explanations like conventional aircraft, helicopters, drones (particularly 2013-era models), or natural phenomena. While the single-witness nature and lack of physical evidence prevent this from being a high-priority case, GEIPAN's formal D1 classification and their explicit statement that it 'does not correspond to classic misidentifications' lends credibility to the anomalous nature of the sighting. The most likely explanation remains an unconventional or experimental aircraft or drone, though the described characteristics don't perfectly match known technology from 2013. Without additional witnesses or physical evidence, we cannot be highly confident in any particular explanation, which is precisely why GEIPAN classified it as unexplained.
AI CONFIDENCE SCORE:
85%
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