CORROBORATED
CF-GEI-20091102511 CORROBORATED

The Castres-Gironde Double Light Formation - ISS/Atlantis Observation

CASE FILE — CF-GEI-20091102511 — CASEFILES CLASSIFIED ARCHIVE
Date Date when the incident was reported or occurred
2009-11-26
Location Reported location of the sighting or event
Castres-Gironde, Gironde, France
Duration Estimated duration of the observed phenomenon
6-7 minutes
Object Type Classification of the observed object based on witness descriptions
formation
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 November 26, 2009, at 18:35 (6:35 PM local time), a witness in Castres-Gironde, a commune in the Gironde department of Aquitaine, France, observed two large luminous points traversing the night sky. The witness was intrigued by the unusual nature of the sighting, which lasted between 6 and 7 minutes. The objects displayed a particularly intense luminosity and moved in formation, following each other at a slow and constant speed. Notably, the witness observed no flashing lights typical of conventional aircraft and heard absolutely no sound associated with the passage of these objects. The case was investigated by GEIPAN (Groupe d'études et d'informations sur les phénomènes aérospatiaux non identifiés), France's official UFO investigation service operated by CNES (Centre National d'Études Spatiales). Despite the witness's initial confusion, no other similar testimonies were collected from the area during the same time period, which limited corroboration opportunities but also suggested the sighting was isolated to this observer's vantage point. Following thorough verification by GEIPAN investigators, the official conclusion determined with high probability that the witness observed the International Space Station (ISS) followed by Space Shuttle Atlantis during mission STS-129. This mission took place from November 16-27, 2009, and involved Atlantis docking with the ISS, creating the exact scenario that would produce two bright objects traveling in formation across the sky. The case received a Classification B from GEIPAN, indicating a "probable identification" with a known phenomenon.
02 Timeline of Events
18:35
Initial Observation
Witness observes two large luminous points appearing in the night sky over Castres-Gironde, traveling in formation
18:35-18:42
Sustained Observation Period
For 6-7 minutes, witness tracks the objects noting particularly intense luminosity, slow constant speed, formation behavior, complete silence, and absence of flashing navigation lights
18:42
Objects Disappear from View
The two luminous points complete their visible pass and disappear, likely dropping below the horizon or entering Earth's shadow
Post-Event
Report to GEIPAN
Witness files official report with GEIPAN describing the unusual sighting. No other corroborating witnesses come forward from the area.
Investigation Phase
GEIPAN Investigation and Verification
GEIPAN investigators cross-reference the date, time, and location with known aerospace activities. Confirm ISS and Atlantis (STS-129 mission) were visible from Castres-Gironde at reported time.
Case Closure
Classification B - Probable Identification
GEIPAN officially classifies the case as Class B (probable identification) with ISS and Space Shuttle Atlantis as the likely explanation
03 Key Witnesses
Anonymous Witness 1
Civilian observer
medium
Single witness from Castres-Gironde who reported the observation to GEIPAN. Demonstrated good observational attention to detail by noting specific characteristics like absence of navigation lights and sound.
"Durant 6 à 7 minutes le témoin remarque une intensité lumineuse particulière et l'absence de feux clignotants et de tout bruit lié à ce passage."
04 Analyst Notes -- AI Processed
This case represents an excellent example of how extraordinary aerospace activities can be misidentified as anomalous phenomena by untrained observers. The witness's observations align perfectly with what would be expected when viewing the ISS and a Space Shuttle in tandem: intense reflected sunlight creating bright points, silent movement (objects are in orbital space), constant slow apparent velocity across the sky, and two objects in formation. The timing of November 26, 2009, falls precisely within the STS-129 mission window (November 16-27), when Atlantis was either docked with or in close proximity to the ISS. The witness demonstrated good observational skills by noting specific details: the absence of navigation lights, the lack of sound, the unusual brightness, and the precise formation behavior. However, the lack of familiarity with orbital mechanics and ISS/Shuttle visibility patterns led to misinterpretation. GEIPAN's classification as "B" (probable identification) rather than "A" (certain identification) likely reflects minor uncertainty about exact orbital pass timing or the possibility of slight discrepancies in witness recollection. The absence of corroborating witnesses is not surprising given the rural nature of Castres-Gironde and the specific viewing geometry required. The 6-7 minute duration is consistent with a visible ISS pass from horizon to horizon.
05 Theory Comparison
BELIEVER ANALYSIS
SKEPTIC ANALYSIS
Conventional Aircraft Misidentification
While GEIPAN's ISS/Atlantis explanation is highly probable, a skeptical alternative might consider two high-altitude aircraft in formation. Commercial or military aircraft at extreme altitude during twilight can appear unusually bright due to sunlight reflection while being too distant for sound to reach ground observers. The absence of visible navigation lights could result from distance or atmospheric conditions. However, this theory struggles to explain the 6-7 minute observation duration without apparent course change and the witness's description of 'slow' movement, which would be unusual for aircraft. This theory is weaker than the official explanation but represents the most plausible conventional alternative.
06 Verdict
ANALYST VERDICT
This case is almost certainly explained as the observation of the ISS and Space Shuttle Atlantis during mission STS-129. The confidence level is high (approximately 90-95%) based on the perfect temporal correlation with the mission timeline and the precise match between observed characteristics and expected visual appearance of these orbital objects. What makes this case valuable for CASEFILES is its demonstration of how even well-documented, explainable phenomena can appear genuinely anomalous to sincere witnesses unfamiliar with space operations. It serves as an important calibration case showing that unusual brightness, silent movement, and formation flight do not automatically indicate unknown phenomena. The witness's detailed observations were valuable for investigation purposes, and GEIPAN's thorough verification process exemplifies proper investigative methodology. This case has minimal ongoing significance beyond its educational value in witness assessment and identification protocols.
AI CONFIDENCE SCORE:
85%
07 Community Discussion
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