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ALSACAT is my comprehensive catalog of UFO sighting reports in Alsace, the region is the North-East of France, whether they are "explained" or "unexplained".

The ALSACAT catalog is made of case files with a case number, summary, quantitative information (date, location, number of witnesses...), classifications, all sources mentioning the case with their references, a discussion of the case in order to evaluate its causes, and a history of the changes made to the file. A general index and thematic sub-catalogs give access to these Alsatian case files.

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Case near the Bâle - Mulhouse airport, in the Summer 2006:

Case number:



On the website of the Swiss ufology group GREPI someone had reported that in the summer of 2006, as taxi driver in the Doubs, he (or she) drove along the Basel-Mulhouse airport on the motorway in the direction of Germany.

By watching the ascent of an airplane, he saw perhaps a kilometer away from this plane; which was itself about one kilometer away, a "golden" rectangular shape which, despite the distance, seemed as big as the plane.

He saw it for about three seconds and then it disappeared from view by turning on itself, thereby showing its thin slice.

He cannot tell if it was moving, and said that the weather was sunny.

A ufology group he does not remember the name of had explained to him that "this was already seen, but black colored."


Temporal data:

Date: Summer 2006
Time: Daytime.
Duration: 3 seconds.
First known report date: 2014
Reporting delay: 20 years.

Geographical data:

Department: Haut-Rhin
City: Blotzheim or Bartenheim
Place: Near the Bâle - Mulhouse airport, UFO in the sky.
Latitude: 47.642
Longitude: 7.497
Uncertainty radius: 10 km

Witnesses data:

Number of alleged witnesses: 1
Number of known witnesses: 1
Number of named witnesses: 0
Witness(es) ages: Adult or aged.
Witness(es) types: ?

Ufology data:

Reporting channel: By the web to the Swiss ufology groupe GREPI.
Type of location: Near an airport, UFO in the sky.
Visibility conditions: Day, sunny.
UFO observed: Yes
UFO arrival observed: ?
UFO departure observed: Yes
Entities: No
Photographs: No.
Sketch(s) by witness(es): No.
Sketch(es) approved by witness(es): No.
Witness(es) feelings: ?
Witnesses interpretation: ?


Hynek: DD
ALSACAT: Possible party balloon.



In the summer of 2006, taxi in the Doubs, I was going along the Basel-Mulhouse airport by the motorway towards Germany.

It is by observing the rise of a plane that I saw, perhaps a mile beyond this plane (itself about one kilometer), a "golden" rectangular shape, which despite the distance seemed as big as the plane.

I saw it for about three seconds and then it disappeared, I guess turning on itself, thereby showing its thin slice.

I cannot tell if it was moving.

Sunshine seen through a windscreen!

An association which I do not remember the name told me that it had already been seen it but in black color.

Following an initial message, I just found a website that reminds me of something of this association. It talks about "repas ufologiques."



It is obviously impossible for me to exclude a priori that this person saw an alien craft.

However, it is also possible to me to rule out that it could have been a party balloon, one of those small mylar balloons that come in many shapes and colors.


Above: a hashtag-shaped mylar party balloon.


Possible party balloon.

Sources references:

* = Source is available to me.
? = Source I am told about but could not get so far. Help needed.

File history:


Main author: Patrick Gross
Contributors: None
Reviewers: None
Editeur: Patrick Gross

Changes history:

Version: Create/changed by: Date: Description:
0.1 Patrick Gross September 2, 2015 Creation, [gri1].
1.0 Patrick Gross September 2, 2015 First published.

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This page was last updated on September 2, 2015.