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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.

Case of Mulhouse, on May 26, 1970:

Case number:



The "Contact Lecteur" supplement #4 of the ufology magazine Lumières Dans La Nuit reported in November 1970 a sighting in Mulhouse in the Haut-Rhin, on April 24, 1970, at about 11:45 p.m.. The magazine gave no source reference.

One miss Chantal Denis, school teacher, had seen from the park to the University District of Mulhouse an object with an unusual behavior, of an apparent size of 2 to 3 millimeters at extended arm's length.

The object went down then up, doing this three times. It stayed at the bottom of this trajectory for 1 or 2 seconds maximum, it stayed motionless at the top of this trajectory fo 1 to 2 seconds, to undertake maneuvers shaped like an "8".

It used 1 to 2 seconds to make the "8" maneuver, the biggest axis being two-thirds of the size of the vertical trajectory.

The object was white when it was performing the "8" maneuvers and when it remained motionless. It was "alternately white" when it descended or ascended along its trajectory.

The witness could see it looking in the east/southeast direction. The duration of the observation was 10 minutes.


Temporal data:

Date: May 26, 1970
Time: ~11:45 p.m.
Duration: 10 minutes.
First known report date: November 1970
Reporting delay: 6 months.

Geographical data:

Department: Haut-Rhin
City: Mulhouse
Place: From the park of the University district in Mulhouse, UFO in the sky.
Latitude: 47.733
Longitude: 7.314
Uncertainty ratio: 200 m

Witnesses data:

Number of alleged witnesses: 1
Number of known witnesses: 1
Number of named witnesses: 1
Witness(es) ages: Adult.
Witness(es) types: Female schoolteacher.

Ufology data:

Reporting channel: Ufology magazine "Lumières Dans La Nuit".
Type of location: From city edges park, UFO in the sky.
Visibility conditions: Night.
UFO observed: Yes
UFO arrival observed: ?
UFO departure observed: ?
Entities: No
Photographs: No.
Sketch(s) by witness(es): No.
Sketch(es) approved by witness(es): No.
Witness(es) feelings: ?
Witnesses interpretation: ?


Hynek: NL
ALSACAT: Unidentified, possible extraterrestrial craft.




Mulhouse (Haut-Rhin) April 24, 1970

Miss Chantal Denis, schoolteacher, saw from the park of the university district in Mulhouse an object with an unusual behavior of an apparent size of 2 to 3 mm at arm's length (at most).

The object came down then ascended again and did this 3 times. It remained at the bottom of the trajectory only 1 to 2 seconds at most, at the top, motionless for 1 to 2 seconds to start maneuvers in the shape of an eight. It took 1 to 2 seconds to follow an eight whose large axis was two third of the vertical trajectory.

The object was white when it did the eights or stayed motionless. It was alternatively white when it went down or up along its trajectory. Direction of the object East/South-East. Duration of the observation 10 minutes.


On May 26, 1970, it is Miss Chantal Denis who observes from the parc of the University, at 11:45 p.m., an object that descends and goes up again three times, following in addition a trajectory in a big 8 in the sky (Contact # 4, November 70).


Mulhouse (68) on May 26, 1970

General features

Num Base: 366
Department: Haut Rhin (68)
Place of observation: Mulhouse
Latitude: 47.75
Longitude: +7.333
Date of observation: May 26, 1970
Hour: 23:45 hours
Duration (HH:MM:SS): 00:10:00
Weather: Nice weather, clear sky
Type of observation: Visual: Distant
Nbr of witness(es): 1
Official investigation: No

Features of the object

Nbr of object: 1
Type of object: Luminous Ball
Size: Not specified
Color: White
Luminosity: fluorescent
Visual characteristics: No indication
Speed: not defined
Movement/Displacement: Complicated moves
Object on the ground: No
Instantaneous disappearance: No


A young woman saw from the park of the University an object of the apparent size from 2 to 3 mm at arm's length. The object descended staying at the bottom of its trajectory for 1 to 2 seconds, then went up again to hover one to two seconds before starting to maneuver in a trajectory of an 8 on the horizontal. It did this three times. The color was a frank white during the times it was motionless or the eights, and blinking during the descent maneuvers or went it went up.


Lumières dans la Nuit

[Ref. uda1:] "UFODNA" WEBSITE:

26 May 1970 23:45

Mulhouse, Alsace, France

One object, larger than a star, was observed for over four minutes (Denis).

Hynek rating: NL Vallee rating: FB1

The sources are indicated as: "Poher, Claude, Etudes Statistiques Portant sur 1000 Temoignag [sic], Author, undated."


Former journalist Christian Valentin published in 2012 a very interesting book telling the story of UFO sightings, flying saucers sightings, in Alsace, from the beginning to 1980.

In this book, he reports that there was a case in Mulhouse on May 26, 1970 at, 09:45 p.m., reported like this in Lumières Dans La Nuit "Contact Lecteurs" #4 for November 1970:

Miss C. D., teacher, saw from the park of the University City of Mulhouse an object with an unusual behavior of an apparent size of 2 to 3 mm at arm's length (maximum).

The object rose ans then came down 3 times. It remained at the bottom of the trajectory for 1-2 seconds maximum, at the top, also 1-2 seconds, to start to change in the shape of an eight. It used 1-2 seconds to make an eight whose major axis was two-thirds of the vertical trajectory.

The object was white when it was performing the 8 or remained motionless. It was alternatively white when it came down or up along its trajectory. Direction of the object East/South-East. Duration of the observation 10 minutes.


City Date and hour of observation General shape
General color
MULHOUSE Tuesday 26 May 1970 at 11:45 p.m. information not communicated
Unsolved -lack of info


LDLN gave no source for the observation report, but I think it might have come from the local ufologist J-P. Schirch, author of the [ldl2] mention and LDLN correspondent.

I should note that the location of the witness is unfortunately somewhat imprecise - and the coordinates in [lcn1] correspond to the city center of Mulhouse, 2 km too far in the northeast:

We are in the southwest of Mulhouse. The red dots indicate the "parks" that can be designated as "park of the Cité Universitaire." The yellow dots could also have been called that way, with less reason.

The buildings of the university itself are in the green circles, the surroundings coudl also have been called "the park". The blue circle identifies building of student housing.

I know very well the places as I lived 300 meters from there for nearly 20 years. I can say that I know of no construction or permanent installation between 1970 and 2015 that could have produced the described show. A brief search did not allow me to find some "event" in Mulhouse on the sighting date, with illuminations for example, that could have matched.

From the possible observation points, the South-East is more or less pointing at the tower of the prominent TV transmitter mast on a hill, but its anti-collision warning lights are red and do not produce at all the reported effects of maneuvers.

For once, we are given an angular size. It is very small.

But what we did not get is:

How did the observation start? Did Miss Denis saw something "coming" or "appear", or did she notice something already there?

How did it end? Did the thing go away with some move, did it go off on the spot? Was it her who left, uninterested after the 10 minutes?

Venus set down at 11:49 p.m., it could be a candidate, the planet was often adorned with virtues of oscillation and a variety of "maneuvers". But then we must ignore the observation direction, between 100 and 130 degrees, as Venus was 310 degrees toward the northwest, so almost the opposite of the indicated viewing direction.


Unidentified, possible extraterrestrial craft.

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 17, 2015 Creation, [ldl1], [ldl2], [lcn1], [uda1], [cvn2], [spa1].
1.0 Patrick Gross September 17, 2015 First published.

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This page was last updated on September 17, 2015.