UNRESOLVED
CF-GEI-20090502565 UNRESOLVED
The Menglon Rotating Rectangle
CASE FILE — CF-GEI-20090502565 — CASEFILES CLASSIFIED ARCHIVE
Date Date when the incident was reported or occurred
2009-05-23
Location Reported location of the sighting or event
Menglon, Drôme, France
Duration Estimated duration of the observed phenomenon
several minutes
Object Type Classification of the observed object based on witness descriptions
rectangle
Source Origin database or archive this case was sourced from
geipan
Witnesses Number of known witnesses who reported the event
2
Country Country where the incident took place
FR
AI Confidence AI-generated credibility score based on source reliability, detail consistency, and corroboration
85%
On Saturday, May 23, 2009, a witness and their family observed a black rectangular object while on vacation in Menglon, a small commune in the Drôme department of southeastern France. The object was described as rotating on its own axis while gaining altitude, eventually disappearing from view as it ascended. The witness did not contact GEIPAN (France's official UAP investigation agency) until February 28, 2010—nearly ten months after the sighting—prompted by a television program that aired on TF1 the previous evening.
The witness submitted the official terrestrial questionnaire on May 12, 2010 (note: the original text contains an apparent typo stating 'May 12, 2009'), almost one year after the events occurred. The submission included a situational plan showing the object's trajectory and a drawing of its rectangular form. No photographs were obtained during the observation, and only a single witness report was filed, limiting the evidentiary value of the case.
GEIPAN's investigation concluded that the observed phenomenon was "probably a balloon, but of a very unusual shape." However, the classification remained 'C' (insufficient information) because reliable meteorological data was unavailable to verify whether the object's movement was consistent with wind patterns at the time. The case exhibits relatively mundane characteristics with significant informational gaps.
02 Timeline of Events
2009-05-23
Initial Observation
Witness and family observe a black rectangular object in the sky over Menglon during their vacation. Object is rotating on its own axis.
2009-05-23 (continued)
Object Ascent and Disappearance
The rectangular object gains altitude while continuing to rotate, eventually disappearing from view as it ascends beyond the witnesses' field of vision.
2010-02-27
Television Program Broadcast
TF1 broadcasts a program about UFO phenomena that motivates the witness to finally report their May 2009 observation.
2010-02-28
Initial Contact with GEIPAN
Nearly ten months after the sighting, witness contacts GEIPAN via email to report the observation.
2010-05-12
Formal Documentation Submitted
Witness submits the completed Questionnaire Terrestre (terrestrial questionnaire) to GEIPAN, including a situational plan showing the object's trajectory and a drawing of its rectangular form. Nearly one year has elapsed since the original sighting.
Post-investigation
GEIPAN Classification
GEIPAN classifies the case as 'C' (insufficient information) due to lack of reliable meteorological data to verify wind patterns, though investigators conclude the phenomenon was probably a balloon of unusual rectangular shape.
03 Key Witnesses
Anonymous Witness 1
Civilian vacationer
medium
Individual on vacation with family in Menglon during May 2009. Delayed reporting by ten months until prompted by television program.
"Not available in source documentation"
Family Members
Civilian witnesses
unknown
Family members present during the observation who witnessed the rectangular object but did not independently file reports.
"Not available in source documentation"
04 Analyst Notes -- AI Processed
This case presents several credibility challenges that warrant careful consideration. The nearly ten-month delay between the observation and initial contact with authorities raises concerns about memory degradation and detail accuracy. The witness was motivated to report only after viewing a television program, suggesting possible contamination of recall through media exposure. The absence of contemporaneous photographs, despite the object being visible long enough to track its rotation and ascent, is noteworthy for a 2009 sighting when mobile phone cameras were commonplace.
The object's described behavior—a black rectangle rotating while gaining altitude—is consistent with various mundane explanations, particularly inflatable advertising or meteorological equipment. GEIPAN investigators identified a balloon as the probable explanation, though they noted the rectangular shape was 'very unusual' for typical balloon configurations. The classification as 'C' rather than 'B' (likely identified) appears based solely on the inability to obtain historical weather data to confirm wind-pattern consistency, not on any genuinely anomalous characteristics. The single-witness report without corroboration further diminishes evidential strength.
05 Theory Comparison
BELIEVER ANALYSIS
SKEPTIC ANALYSIS
Advertising or Research Inflatable
The rectangular shape and behavior suggest a specialized inflatable object such as advertising equipment, research apparatus, or kite-related gear. Rectangular advertising inflatables and research balloons do exist and can exhibit rotation when subjected to variable wind conditions. The witness's unfamiliarity with such equipment, combined with viewing it against the sky without reference points, could explain the reported strangeness. The delayed reporting and media-prompted contact suggest the witness had no strong conviction about the observation's anomalous nature at the time.
06 Verdict
ANALYST VERDICT
This case most likely represents a misidentified balloon or inflatable object of unconventional rectangular design, possibly advertising or research-related equipment. Confidence in this assessment is moderate-to-high. The GEIPAN investigators' own conclusion points to a balloon, and the described behavior (rotation while ascending) is entirely consistent with such objects in variable wind conditions. The 'unusual' rectangular shape, while noteworthy, is not unprecedented—specialized research balloons, advertising inflatables, and kite-related equipment can take non-traditional forms. The case holds minimal significance for serious UAP research due to the delayed reporting, lack of photographic evidence, absence of multiple independent witnesses, and straightforward mundane explanation. It serves primarily as an example of how unusual conventional objects can prompt reports when witnesses lack immediate reference points for identification.
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.