CORROBORATED
CF-GEI-20120808311 CORROBORATED

The Lyon ISS Misidentification

CASE FILE — CF-GEI-20120808311 — CASEFILES CLASSIFIED ARCHIVE
Date Date when the incident was reported or occurred
2012-08-23
Location Reported location of the sighting or event
Lyon, Rhône-Alpes, 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 August 23, 2012, at approximately 23:00 hours, a single witness in Lyon, France observed a peculiar yellow luminous point in the night sky that exhibited slow horizontal movement. The witness was initially intrigued by the unusual presence of this light, which moved silently across the sky without producing any audible sound. The observation ended when the luminous object disappeared behind the urban landscape, obscured by buildings. Following the initial report, GEIPAN (Groupe d'Études et d'Informations sur les Phénomènes Aérospatiaux Non Identifiés) investigators conducted multiple exchanges with the witness to establish precise observation parameters. Through careful analysis of the witness's viewing direction and timing, investigators were able to pinpoint the object's trajectory with high accuracy. The witness reported observing the light moving across the southwestern horizon. GEIPAN's investigation conclusively determined that the observation direction corresponded exactly with a passage of the International Space Station (ISS) over the southwestern horizon at the same time as the reported sighting. Orbital tracking data from Calsky confirmed the ISS pass with a visual magnitude of -1.6, making it clearly visible to the naked eye as a bright, slowly moving point of light. This case received GEIPAN's "A" classification, indicating a phenomenon that has been positively identified with certainty.
02 Timeline of Events
23:00
Initial Observation
Witness notices a peculiar luminous yellow point in the night sky over Lyon, appearing brighter and different from typical stars.
23:00-23:05
Horizontal Movement Observed
Witness observes the slow, steady horizontal movement of the yellow light across the southwestern sky. No sound is detected during the passage.
23:05
Object Disappears
The luminous point disappears from view, obscured by the urban landscape and buildings of Lyon.
Post-incident
GEIPAN Investigation Initiated
Multiple exchanges conducted between GEIPAN investigators and witness to determine precise observation direction and timing.
Post-incident
Orbital Correlation Confirmed
GEIPAN cross-references witness data with CalSky orbital tracking, confirming ISS pass over SW horizon at identical time with magnitude -1.6. Case classified as "A" - positively identified.
03 Key Witnesses
Anonymous Witness 1
Civilian observer
medium
Lyon resident who reported unusual aerial light. Cooperated fully with GEIPAN investigation through multiple follow-up exchanges to establish precise observational parameters.
"Le témoin est intrigué par la présence d'un point lumineux particulier dans le ciel. Le témoin constate ensuite le lent déplacement horizontal de cette lueur jaune."
04 Analyst Notes -- AI Processed
This case represents a textbook example of ISS misidentification and demonstrates the value of systematic investigation methodology. The witness exhibited responsible reporting behavior by noting specific observational details: the yellow color, horizontal movement, silent passage, and approximate timing. These characteristics are entirely consistent with ISS observations, as the station appears as a bright, steadily moving light that traverses the sky in approximately 3-5 minutes during visible passes. The investigation's credibility is strengthened by GEIPAN's thorough follow-up process, which involved "plusieurs échanges" (multiple exchanges) with the witness to establish precise directional data. The correlation with CalSky orbital tracking data at magnitude -1.6 provides definitive confirmation. The ISS at this magnitude would appear as one of the brightest objects in the night sky after the Moon and Venus, easily mistaken for something unusual by observers unfamiliar with satellite passes. The southwest viewing direction, silent movement, and 23:00 hours timing all align perfectly with documented ISS orbital parameters for this date and location.
05 Theory Comparison
BELIEVER ANALYSIS
SKEPTIC ANALYSIS
06 Verdict
ANALYST VERDICT
This case is definitively explained as an observation of the International Space Station. The witness's description matches ISS characteristics exactly: bright yellow-white appearance, steady horizontal movement, complete silence, and several-minute duration. GEIPAN's Class A classification indicates absolute certainty in this identification, supported by precise orbital tracking data. While this sighting holds no anomalous qualities, it serves as an excellent educational example of how unfamiliarity with common astronomical objects can lead to UFO reports, and demonstrates the importance of systematic investigation with astronomical cross-referencing. The case has no significance for anomalous phenomena research but validates GEIPAN's investigative protocols.
AI CONFIDENCE SCORE:
85%
07 Community Discussion
VIEW ALL >
// AUTHENTICATION REQUIRED
Sign in to contribute analysis on this case.
LOGIN
// 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.
OPEN LIVE CHAT 1
// SECURITY CLEARANCE NOTICE

This system uses cookies to maintain your session and operational preferences. Optional analytics cookies help us improve the archive. Privacy Policy