Přibram (meteorite)

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The fall of the meteorite Přibram occurred on April 7, 1959 at 20:30:21 CET near the Central Bohemian town of Příbram in what was then Czechoslovakia .

Four fragments with a total mass of approx. 5.5 kilograms were recovered from the original meteorite . Přibram was classified as a common chondrite (type H5), a common group of stone meteorites . It is considered to be the first meteorite worldwide that could be found based on simultaneous photographic recordings with meteor cameras .

Meteorite fall and record

The light trail of the meteor within the atmosphere began at an altitude of around 98 kilometers. In the lower part of the trajectory (in about 44-13 kilometers above) became detached from the Boliden a series of fragments (about 17 pieces in total.).

The Czech observatory Ondřejov received recordings of the fall with several cameras that were widely spaced. With the help of this stereo recording (by triangulation ) the trajectory of Přibram could be reconstructed very exactly. The European fireball network in Germany and other countries has been searching the night sky for bright meteors (so-called fireballs ) with the same technology since the 1970s .

Analysis of the heliocentric orbit

asteroid
Properties of the orbit
Orbit type ?
Major semi-axis 2.401 ± 0.002  AU
eccentricity 0.6711 ± 0.0003
Perihelion - aphelion 0.78951 ± 0.00006 AU - 
4.012 ± 0.005 AU
Inclination of the orbit plane 10,482 ± 0.004 °
Physical Properties
Medium diameter 1.8 m
Dimensions 250-2000 Template: Infobox asteroid / maintenance / masskg
Absolute brightness -19.2 (46 km of height) mag
history
Explorer Ondřejov observatory
Date of discovery April 7, 1959 19h 30min 21s ± 1s UT
Another name EN070459
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

Template: Infobox Asteroid / Maintenance / SSD_ID

The orbit of the meteoroid Přibram ( European Network designation: EN070459) around the sun could be calculated back from the data records . It was only 43 years later that it turned out that it almost exactly matched the orbit of the meteoroid Neuschwanstein (EN060402), the fall of which was recorded on April 6, 2002 in Bavaria . It was therefore obvious that both meteorites came from the same mother body. Neuschwanstein , however, is a so-called enstatite chondrite (type EL6), an extremely rare group of stone meteorites. Přibram belongs to the common chondrites (type H5). A comparison of the cosmogenic isotopes of the two stones shows that Neuschwanstein is 48 million years old, while that of Přibram is 12 million years. A common mother body would have to be of a heterogeneous nature. At best, it could then be a “rubble pile” held together by gravity , which was blown up by a collision with another celestial body.

Finds and naming

After the fall, a total of four fragments were recovered. They were given the names of the places near which they were found: Luhy (4250 grams), Velká (772 grams), Hojšín (428 grams) and Dražkov (105 grams). However, it was decided to give the meteorite fall the name "Příbram" , named after the calculated fall location of the hypothetical main mass of the meteorite.

See also

literature

  • Dieter Heinlein (Ed.): The fireball from April 6, 2002 and the sensational meteorite fall "Neuschwanstein" . 1st edition, Augsburg 2004

Web links

Individual evidence

  1. ↑ Z. Ceplecha: Multiple fall of Pribram meteorites photographed. 1. Double-station photographs of the fireball and their relations to the found meteorites in Bulletin of the Astronomical Institute of Czechoslovakia , vol. 12, pp. 21-47, bibcode : 1961BAICz..12 ... 21C
  2. ↑ Dieter Heinlein: The fireball from April 6, 2002 and the sensational meteorite fall "Neuschwanstein" . 1st edition, Ed .: Dieter Heinlein, Augsburg 2004, p. 30 ff.
  3. ↑ http://fireball.meteorite.free.fr/meteor/en/4/1959-04-07/pribram/data
  4. ↑ Hans Zekl: Neuschwanstein and Příbram: two unequal brothers , for astronews.com, May 13, 2003 Neuschwanstein and Příbram: two unequal brothers
  5. ↑ Dieter Heinlein: The fireball from April 6, 2002 and the sensational meteorite fall "Neuschwanstein" . 1st edition, Ed .: Dieter Heinlein, Augsburg 2004, p. 29 ff.
  6. ^ P. Spurný, J. Oberst, D. Heinlein: Photographic observations of Neuschwanstein, a second meteorite from the orbit of the Příbram chondrite in Nature , Vol. 423, No. 6936, edition 05/2003, pp. 151–153, bibcode : 2003Natur.423..151S
  7. ↑ Pseudo-relationship in the asteroid family in MaxPlanckResearch , issue 4/2002 ( PDF ( Memento from May 15, 2004 in the Internet Archive ))
  8. ↑ Dieter Heinlein: The fireball from April 6, 2002 and the sensational meteorite fall "Neuschwanstein" . 1st edition, Ed .: Dieter Heinlein, Augsburg 2004, p. 29