Unspecified over [Aero Afr] Chamonix-Mont-Blanc, Rhône-Alpes · France
A conventional explanation is favored by the record but was never formally confirmed.
The report, as filed
Lors d' un vol Rome-Paris, un passager observe un objet allongé brillant et qui se déplace de droite à gauche en- dessous de l'avion. Le pilote intérrogé à l'arrivée se souviendra avoir vu à l'heure indiquée par le passager un avion brillant dans le soleil couchant et se déplaçant de la droite vers la gauche. Cet avion laissait une faible trainée de condensation derrière lui. Le témoin a probablement vu cet aéronef. [GEIPAN classification B — Aéronef]
Held as-reported from GEIPAN, Centre national d'études spatiales (record GEIPAN 1978-12-00576). Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.
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Routed to: GEIPAN / CNES (France) · records window 1978-12-04 → 1978-12-21