Flensburg (meteorite)
The Flensburg meteorite fell in the Flensburg area in September 2019 . It is not to be confused with the asteroid of the same name .
background
On September 12, 2019 at 2:49:48 p.m., a meteoroid entered the earth's atmosphere over northern Germany. A daylight ball of fire that was visible from afar formed and was recorded by some cameras. Sonic boom noises could be heard in Schleswig-Holstein . According to eyewitnesses from Belgium , the Netherlands , the United Kingdom , Denmark and Germany , there were initially many indications that possible meteorites would have fallen into the North Sea. NASA data and more detailed evaluations then showed that meteorite falls could have occurred in the German-Danish border area.
Independently of this, Erik Due-Hansen from Flensburg discovered an unusual stone in his garden in the Weiche district on September 13th , which he thought was a meteorite. Experts quickly found that the 24.5-gram stone was actually a meteorite fragment that came from the September 12 event. Extensive investigations by Addi Bischoff at the University of Münster showed a very rare ungrouped carbonaceous chondrite of type C1. According to Bischoff, "Flensburg [...] in relation to Germany is by far the most scientifically most important meteorite case by far".
The Meteoritical Bulletin Database has been listing the meteorite since February 5, 2020 under the name Flensburg , named after the place where it was found. A part of the meteorite was separated for the classification, the remaining main mass of 17.06 grams was bought by the Westfälische Wilhelms-Universität Münster on January 8, 2020. Around 15 institutes in Germany, France and Switzerland are still investigating the meteorite.
Data
The meteoroid came from the south at a speed of 18.5 km / s. It released an energy of 0.48 kt TNT equivalent at an altitude of 42 km , as determined by NASA. From the data from NASA, the Dutchman Marco Langbroek calculated an Apollo orbit and a diameter of about 2 m for the original celestial object.
search
Despite an intensive search for further meteorites, no new finds have been made so far.
See also
Web links
- KARMAKA METEORITES
- Flensburg is something special at astronews.com
- Spektrum .de: amateur recordings [1] [2] [3]