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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 Dorlisheim, on November 15, 1998:

Case number:



The ufology magazine Lumières Dans La Nuit for June 1999 reportedly published about a UFO sighting that occurred on November 15, 1995, at or about 9:35 p.m. in Dorlisheim in the Bas-Rhin.

The witness was driving on the D500 road, coming from Rosheim and going to Molsheim, when he suddenly saw a set of luminous rings, coming from the rear of the vehicle to move about ten meters above the car.

The phenomenon occupied the entire width of the windscreen and moved in an undulating path, such as a snake, with jerky movements.

No object was strictly speaking seen; it was a set of luminous cloudy rounds, "a laser phenomenon" was not excluded.

The sky was overcast quite low, and this phenomenon was below the cloud layer.

The observation lasted one minute.


Temporal data:

Date: November 15, 1998
Time: ~09:35 p.m.
Duration: 1 minute.
First known report date: June 1999
Reporting delay: 7 months.

Geographical data:

Department: Bas-Rhin
City: Dorlisheim
Place: From the car driving near Dorlisheim from Rosheim to Molsheim, UFO in the sky.
Latitude: 48.523
Longitude: 7.498
Uncertainty ratio: 1 km

Witnesses data:

Number of alleged witnesses: 1
Number of known witnesses: 1
Number of named witnesses: ?
Witness(es) ages: Young adult, adult or aged.
Witness(es) types: ?

Ufology data:

Reporting channel: ?
Type of location: From the car driving on main road, 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: Probable Skytracers.


[Ref. uwb1:] "UFOWEB" WEBSITE:

Dorlisheim 67 48,533 7.483 1998


Dorlisheim (67) on 15 November 1998

General features

Num Base: 3096
Department: Bas Rhin (67)
Place of observation: Dorlisheim
Latitude: 48.533
Longitude: +7.483
Date of observation: 15 November 1998
Hour: 21:35 hours
Duration (HH:MM:SS): 00:01:00
Weather: Sky covered low altitude
Type of observation: Visual: Distant
Nbr of witness(es): 1
Official investigation: No

Features of the object

Nbr of object: 1
Type of object: Non-défini
Size: Not specified
Color: not defined
Luminosity: Not specified
Visual characteristics: No indication
Speed: not defined
Movement/Displacement: Not specified
Object on the ground: No
Instantaneous disappearance: No


The witness drives on the D500 coming from Rosheim and going towards Molsheim. Suddenly a group of luminous rings, coming from the back of the vehicle passes at ten meters above the car. The phenomenon occupies all the width of the windshield and moves according to an undulating trajectory like a snake with jerked movements; duration one minute. The sky is covered rather low, the phenomenon is located below the vapor cloud. There is no object to be strictly accurate, but a group of luminous rounds of cloudy aspects. A phenomenon of laser is not to be excluded.


Lumières dans la Nuit issue 352


City Date and hour of observation General shape
General color
DORLISHEIM Sunday 15 November 1998 at 09:35 p.m. Circular, round or disc (2D)
information not communicated
Unsolved -lack of info


On the path traveled on the D400 before and after Dorlisheim, I find no nightclub in 2015. But this does not exclude that there was one in 1998, nor even that there was some temporary party place.

The first source told about "laser"; the device is not really a laser, but ordinary light projectors, motorized, of the "SkyTracer" type.

About "Skytracers":

One sometimes call them "discotheque lasers", it is often so in the regional Pres, as a cause of UFO sightings. They are actually not lasers but projectors of ordinary light.

The purpose of these Skytracers is to get attention from far away, up to miles away. Lasers are mostly effective on location, inside a nightclub or on a concert place.

Their light can be white, but it can also have a green, blue, red, yellow hue... Motors are used to move the projections on 1, 2 or 3 axis. By software, they can be programmed to perform sequences of more or less repetitive figures; as witnesses often report.

When there is vapor in the air from the ground up, the Skytracer produces a beam of light, fixed or mobile.

It can produce the impression of a "luminous cigar."

But id a low cloud layer tops a mass of dry air on the ground, there is no visible beam, one sees the projection of the beam on the bottom of the clouds. It is mostly in such conditions that people sometimes are unable to recognize projectors.

With several networked and programmed Skytracers, it is possible de produce shows of the "flying saucer" or "flying saucers formation" kind.


Probable Skytracers.

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 August 29, 2015 Creation, [uwb1], [lc], [spa1].
1.0 Patrick Gross August 29, 2015 First published.

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This page was last updated on August 29, 2015.