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press news - News Presse Deutsch

The days in mid-February 2013 will burn into the global memory. After initial reports of the Chelyabinsk-Meteor arrived on Friday afternoon, it was clear that this is a natural phenomenon that will not be forgotten quickly. In the evening, took the DA14 Asterioid its flyby to the Earth and moved silently across the cloudy night sky. Like as a "Good Bye" a small meteorite throughed the sky over Leipzig.

from Ralf Heckel

DA14-01

Humanity woke up from a sleep as a blinding flash of light and thunderous bang rolled over the Russian city of Chelyabinsk on the afternoon of 14 February 2013. It was a meteor of about 10 tons, only a few ft´s tall and could not be detected in advance. He damaged by the shock wave to a loss of about 250 million euros. According to media disclosures about 1200 people have been injured by broken glass.

Many motorists and people stopped this event firmly on their dashboard- and mobile phone cameras. After a few hours, dozens very good records were in the Internet, which are all unique. It is spoken by an explosion that triggered seismic sensors around the globe. Anyone who has experienced the re-entry of a space shuttle, who knows that there is a loud double bang from the sound barrier breakdown. The speed of sound becomes  slowler in colder, higher altitude atmosphere. Is there a re-entry of a body by fast speed, it will become a critical level by a lower altitute, which is built up the sound barrier. It still takes place in areas around Mach 10-20 and at altitudes of 30-50 km. The "Bang" is not from an explosion, like all medias explained. This "Super Sonic Boom" went out to the higher atmosphere, Only a small amount of energy penetrating the lower layers of air with a lot of echoes and at different speeds. It was still large enough to let go thousands windows and doors to break and is compared with the energy of 20 times of a Hiroshima bomb. Fortunately, distributed the bang and the shock wave through the high speed projectile on an elongated period. If the boom would all arrived at once, then the damage would be more.

Dim lights

"From now on the people on the earth begins a new awareness of cosmic events - which also has its good points."

During this time, the amateur astronomer Henri Schulz worked in the north of Leipzig, still at his observatory (www.sternwarte-kletzen.de). He would like to take the announced for the evening flyby of Asterioiden DA14 and feeds the computer with fresh data from Hamburg. This proves to be very difficult because no observatories software can calculate a swingby maneuver. In one maneuver the swingby Asterioid is deflected by the gravity of the earth, and changes its flight path. He pulls a slight curve near the Earth and continues to fly in a different direction. The Science uses this for unmanned spacecrafts to accelerate their long trajectories in Jupiter- or Saturn system or even control. Rush Mr Schulz programmed and selected some windows. But the serene afternoon sky over Leipzig plays not with him, it runs on the evening. At least now all astronomers went into the warm house and watching the events in the Internet.

DA14-02

Out of sheer anger at the many useless programming work and the cloud-covered sky Mr. Schulz pushes yet in his observatory Kletzen the B´button. ...and to the surprise of all, he recorded the path of DA14 over Saxony, by cloudly sky! 24 hours later, still on the Internet only recordings from Australia can be found, but not from Germany. Although the image quality of Asterioiden snapshot is through the clouds is not particularly good, but you can clearly see the 5-minute track of DA14. To the surprise of even a small meteorite suggests itself in the image. How small is the observed part of the sky, can be seen in photo 2. The small gray rectangle in the red trace is precalculated about the size of the captured photos represent a sufficiently precise calculation of the trajectory of the meteorite after its swingby maneuver. It is a major accomplishment. A connection between the DA14 and Chelyabinsk-Meteor on the same day there is not. But there is a correlation between the randomly picked micro meteorite Leipzig and Chelyabinsk meteor. Both came from the same direction.

More on www.sternwarte-kletzen.de

 
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