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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 of Riedisheim, on November 5, 1973:

Case number:



In an article in the 1910's about another sighting, ufologist Raoul Robé mentions a UFO sighting in Riedisheim on November 5, 1973.

No source or other information is given and I found nothing about it.


Temporal data:

Date: November 5, 1973
Time: ?
Duration: ?
First known report date: 2014?
Reporting delay: Day, 4 decades?

Geographical data:

Department: Haut-Rhin
City: Riedisheim
Place: ?
Latitude: -7.355
Uncertainty radius: 10 km

Witnesses data:

Number of alleged witnesses: ?
Number of known witnesses: 0
Number of named witnesses: 0
Witness(es) ages: ?
Witness(es) types: ?

Ufology data:

Reporting channel: ?
Type of location: ?
Visibility conditions: ?
UFO observed: ?
UFO arrival observed: ?
UFO departure observed: ?
Entities: ?
Photographs: ?
Sketch(s) by witness(es): ?
Sketch(es) approved by witness(es): ?
Witness(es) feelings: ?
Witnesses interpretation: ?


Hynek: ?
ALSACAT: Totally insufficient information.




- On November 5 [1973] around 6:40 p.m., in the region of Masevaux (Haut-Rhin) several people witnessed the moves of two U.F.O. shortly after 10 p.m. Shortly after 10 p.m., a red luminous object accompanied by a smaller object is observed for 5 minutes in the sky of Ruelisheim. The two craft then head towards the Hasenram [sic, Hasenrain, Mulhouse hospital.].

[Ref. rre1:] RAOUL ROBE:

In the article on an Alsatian alleged sighting, that of Merxheim, the author shows a series of other "known UFO sightings around" that location, including:

RIEDISHEIM - 11/5/73 at 10,4 km S.E. [from Merxheim]



My extensive 2014 search on the web and in my UFO documentation revealed no other sign of this observation mentioned by Raoul Robé.

I spent my childhood and adolescence in Riedisheim, I was 10 years old that year. I have no recollection of such an observation; while I remember the so-called "UFO trace" in Riedisheim in 1971. It is quite possible that I was unaware of it then, of course. On the other hand, it is possible that the date given by Raoul Robé is in error and that the case is the one of 1971.

Update on February 24, 2023:

I added the source [cgu1]. The author and ufologist Charles Garreau mentioned a sighting in Ruelisheim; it is possible that the source [rre1] misread Ruelisheim, becoming Riedisheim.

On the other hand, Garreau talks about two craft that headed for the "Hasenram". Here, it is he or the printer who are mistaken, it is obviously the Hasenrain, Mulhouse's main hospital at that time.

The Hasenrain is almost on the edge of Riedisheim. It is therefore possible that again, it is Gareau who is wrong and that [rre1] is not wrong.



Totally insufficient information.

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 May 20, 2014 Creation, [rre1].
1.0 Patrick Gross May 20, 2014 First published.
1.1 Patrick Gross February 24, 2023 Addition [cgu1]. In the Explanations, addition of the "Update on February 24, 2023" part.

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This page was last updated on February 24, 2023.