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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 Oberbronn, on December 24, 1975:

Case number:



In 1978, the newspaper Les Dernières Nouvelles d'Alsace had reported a sighting in Oberbronn. Reading the article on October 11, 1978, one Mrs. B. had written to a Mr. Lienhardt, ufologist of the CFRU of Strasbourg, to tell about an observation in Oberbronn too three years earlier, December 24, 1975. This letter was forwarder later to Christian Valentin who published it in his 2012 book about UFOs in Alsace.

Mrs. B. reported in her letter that on the night from December 23 to 24, 1975, his son, then Auxiliary Constable in Auxerre, and on leave at their home in Oberbronn for Christmas, came back home at 02:30, waking his parents up and saying "you'll believe I am crazy, but I have seen with my fellow a UFO, a big orange-white ball motionless above the forest that seemed tp rotate on itself, throwing projector rays, within minutes it was joined by a smaller, reddish ball, that seemed to enter the larger one, upon that the UFO disappeared."

The son had taken his father's shotgun, and with his friend, they took the way to the forest to look for evidence, and returned an hour later, having found nothing.

They never wanted to talk about this story, but Mrs. B. found it was similar with Mrs. W.'s observations in 1978 reported in the newspaper, and had decided to communicate it to Mr. Lienhardt, adding that her son was now a Gendarme.

Christian Valentin added that on January 13, 2011, the witness, D. B., retired recently, had confirmed to him the information in his mother's letter. He was previously unaware that his mother had written the letter.

He said that the event took place on the Daumen, the highest point at 310 meters above the village of Oberbronn. The white glow, vivid, departed to the South-East while fading.


Temporal data:

Date: December 24, 1975
Time: ~02:00 a.m.
Duration: ?
First known report date: October 11, 1978
Reporting delay: 3 years.

Geographical data:

Department: Bas-Rhin
City: Oberbronn
Place: From the Daumen mound near Oberbronn, UFO in the sky.
Latitude: 48.848
Longitude: 7.591
Uncertainty ratio: 500 m

Witnesses data:

Number of alleged witnesses: 2
Number of known witnesses: 1
Number of named witnesses: 0
Witness(es) ages: Young adults.
Witness(es) types: Auxiliary gendarme, a male friend.

Ufology data:

Reporting channel: Letter from the witness mother to local ufologist.
Type of location: From wooden hilltop, UFO in the sky.
Visibility conditions: Night.
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: Puzzled.
Witnesses interpretation: A UFO.


Hynek: NL
ALSACAT: Unidentified, possible extraterrestrial craft.



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 on December 24, 1975, in Oberbronn in the Bas-Rhin, the following observation occurred, rescued from oblivion by a UFO event that occurred three years later.

It was on October 11, 1978, that Mrs. B., reading about a phenomenon reported in Les Dernières Nouvelles d'Alsace, had sent the following letter to Mr. Lienhardt of the CFRU of Strasbourg; who gave a copy to Christian Valentin 32 years later:

Following the article "a UFO above Strasbourg" I am sharing an observation of my son on the night from December 23 to 24, 1975. My son was at that time an Auxiliary Constable Auxerre and came home in Oberbronn for Christmas. He was home at 02:30 a.m., waking us up and told us: 'you will believe I am crazy, but I have seen ufos with my comrade. A big white orangeish ball motionless above the forest seeming to rotate on itself, throwing projector rays; a few minutes later it was joined by a smaller and reddish ball, it seemed to fit into the big one, whereupon the UFO disappeared."

Our son took the shotgun from his father and with his friend they took the road to the forest to look for evidence. Finding nothing, they returned an hour later. They never wanted to talk about this story, but as I found it is identical with the observation by Ms. W., I communicate it to you. My son is now gendarme.

Signed Mrs. B.

Christian Valentin adds that on January 13, 2011, the witness D. B., retired recently, had confirmed to him the information in his mother's letter; which he previously did not know about.

He said that the event took place on the Daumen, the highest point at 310 meters above the village of Oberbronn. The white glow, very bright, departed to the South-East while fading.


About Christian Valentin's book:

It is not at all my habit to "advertise" a book or anything, and I have no interested relationship with the author, but I wanted to say a word on the book by Christian Valentin, "Mythes et Réalités des Phénomènes Aériens Non Identifiés" (i.e. "Myths and Realities of Unidentified Aerial Phenomena" (cover on the left) , ref. [cv2]; which, as its subtitle indicates, is about Alsatian UFO sighting reports and the saucer lore in Alsace.

I think Alsatian ufologists and generally people interested in the UFO question, or in the history of Alsace, my region, would probably like this book.

The 144 pages book is sober but well presented, unbiased, richly documented and illustrated. It is the first work in print specifically about UFO sightings in Alsace. (There was another one a few years ago, but it was partly made by copying - pasting without mention of the sources, portions of my website, especially the Alsatians cases I almost exhaustively documented in my catalog of UFO sightings in France in 1954, and copies from another websites; the trivial explanations I proposed or gave there being almost always stripped off!)

The author does not want to prove or disprove the possibility of extraterrestrial visitors or some other so-called "extraordinary" explanation, he rather offers a chronologically ordered review of Alsatian UFO reports, starting from the origin and stopping in 1980, based on known sources ufology, on the articles of the regional Press, and cases less known or even unreleased so far that he collected directly with the witnesses. His own comments are printed in a different color, references to the sources are always given. A very nice work in my opinion!

The author currently has a blog where he shows what libraries in Alsace have the book available, see:

The Daumen can be reached starting from Oberbronn walking about 1 km forest on the Daumen to Linsenthal forest road.

The case seems of high strangeness, to me, nothing known or ordinary seems a good explanation of what is reported. Better documentation, and an investigation with the two witnesses might have been useful.


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 April 14, 2016 Creation, [cvn2].
1.0 Patrick Gross April 14, 2016 First published.

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This page was last updated on April 14, 2016.