CORROBORATED
CF-GEI-20230251446 CORROBORATED

The Plessis-Belleville Sky Lantern Incident

CASE FILE — CF-GEI-20230251446 — CASEFILES CLASSIFIED ARCHIVE
Date Date when the incident was reported or occurred
2023-02-26
Location Reported location of the sighting or event
Le Plessis-Belleville, Oise, France
Duration Estimated duration of the observed phenomenon
Several minutes
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
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 February 26, 2023, at 1:00 AM, a lone witness observed from their residence in Le Plessis-Belleville (Oise department) a fire-colored flying object with orange flames. The witness reported that the object traveled at what appeared to be the same speed and altitude as a tourist aircraft, moving in a straight line from the northwest (near the commune of Silly-le-Long) toward the southeast, in the direction of Roissy Charles de Gaulle Airport. The case was officially investigated by GEIPAN (Groupe d'études et d'informations sur les phénomènes aérospatiaux non identifiés), France's official UAP investigation unit operated by CNES (Centre National d'Études Spatiales). However, the investigation noted weak case consistency due to limited documentation—only a police report (PV de gendarmerie) was available, with no completed technical questionnaire, photographs, or video evidence. Despite the limited evidence, GEIPAN's analysis concluded with high confidence that the sighting was a Chinese sky lantern. This determination was supported by meteorological data from a station 18 kilometers from the witness location, which recorded winds of 18 km/h oriented from northwest to southeast—precisely matching the observed trajectory of the object. The timing on a Saturday night going into Sunday morning was noted as typical for sky lantern releases during weekend celebrations.
02 Timeline of Events
01:00
Initial Sighting
Witness observes fire-colored object with orange flames from their residence in Le Plessis-Belleville
01:00-01:0X
Object Trajectory Observed
Object moves in straight line from northwest (Silly-le-Long area) toward southeast (direction of Roissy Charles de Gaulle Airport). Witness estimates speed and altitude comparable to tourist aircraft
2023-02-26
Police Report Filed
Witness files official report (PV) with local gendarmerie
2023-02-26 to Investigation
GEIPAN Investigation Initiated
Case assigned GEIPAN ID 2023-02-51446. Investigation proceeds with limited documentation—police report only, no technical questionnaire or visual evidence
Investigation Phase
Meteorological Analysis Conducted
Weather data obtained from station 18km from witness location confirms 18 km/h winds oriented NW to SE, matching observed trajectory
Investigation Conclusion
Case Classified A - Explained
GEIPAN concludes with high certainty that object was a Chinese sky lantern based on description, meteorological correlation, and weekend timing
03 Key Witnesses
Anonymous Witness 1
Civilian resident
medium
Local resident of Le Plessis-Belleville who observed the phenomenon from their home at 1:00 AM. Provided report to local gendarmerie.
"Un objet volant de couleur feu, avec des flammes orange, volant à la même vitesse et la même altitude qu'un avion de tourisme."
04 Analyst Notes -- AI Processed
This case demonstrates effective investigation methodology despite minimal evidence. GEIPAN's classification system rated this as 'A' (identified with high certainty), their highest confidence level for explained phenomena. The investigator's reasoning is sound: the witness's specific description of 'fire color' and 'orange flames' is highly characteristic of sky lanterns, which are essentially small hot air balloons with an open flame heat source. The meteorological correlation is particularly compelling—wind direction and speed perfectly account for the observed northwest-to-southeast trajectory and steady apparent velocity. The credibility assessment is straightforward. With only a single witness, no corroborating evidence, and characteristics entirely consistent with a common man-made object, there are no anomalous elements requiring further investigation. The weekend timing factor adds contextual support, as sky lanterns are frequently released during celebrations. The witness's comparison to 'tourist aircraft' altitude and speed is subjective and likely inaccurate, as sky lanterns typically fly at much lower altitudes (500-1000 meters) and slower speeds than aircraft, though distance perception at night can be deceptive.
05 Theory Comparison
BELIEVER ANALYSIS
SKEPTIC ANALYSIS
Misidentified Conventional Aircraft
Alternative explanation: witness may have observed conventional aircraft approaching Roissy Charles de Gaulle Airport with landing lights appearing orange/red due to atmospheric conditions or viewing angle. The witness's comparison to 'tourist aircraft' speed and altitude could support this. However, this theory is weaker than the sky lantern hypothesis given the specific 'flames' description and wind correlation.
06 Verdict
ANALYST VERDICT
GEIPAN's conclusion is well-founded: this sighting was almost certainly a Chinese sky lantern. The complete alignment of witness description (fire-colored object with orange flames), meteorological conditions (wind speed and direction matching trajectory), temporal context (weekend night), and the absence of any anomalous characteristics makes this determination highly reliable. This case holds minimal significance for UAP research but serves as a useful reference example of how mundane objects can be mistaken for unknown phenomena, and demonstrates the importance of meteorological analysis in investigations. The classification as 'A' (explained with high certainty) is appropriate and this case requires no further investigation.
AI CONFIDENCE SCORE:
85%
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