On Offer: Conmemorative coin of the 100th Anniversary Tunguska meteorite observed fall on June 30, 1908

Limited Edition: Coin No. 805 of 1000 total commemorative coins made.

Diameter Size: 51mm

Coin Thickness: 4mm

Description:

This is commemorative coin # 805 of the famous Tunguska meteorite witnessed fall that occurred near the Podkamennaya Tunguska River in Krasnoyarsk region, Siberia, Russia, on the morning of June 30, 1908.

One side of the coin shows a portrait of L.A. Kulik, first scientist who made several expeditions to the site and studied the event. The other side shows a modern view of the site.

This coin was made in 2008.

History:

In the summer of 1957, while studying simples of soil brought by L.A. Kulik's expeditions in the years 1929-1930 from the place of the Tunguska Meteorite (U.S.S.R.) fall, A. A. Yavnel', of the Committee on Meteorites, U.S.S.R.. Academy of Sciences, discovered particles of meteoritic and meteoric dust.

The particles of the meteoritic dust are small laminae with sharp corners, chips or pieces measuring a fraction of a millimeter or more, and are the result of the crushing of the meteorite during its fall (explosion). Spectrographic and microchemical analyses showed iron with 7 to 10 per cent nickle content and approximately 0.7 per cent cobalt. The composition and presence of some dust particles clearly shaped as little columns prompt the suppostition that the Tunguska meteorite is of the iron, oetahedrite class.

The particles of dust are regular black globules (probably magnetite) 0.03 to 0.06 mm in diameter. So far only nine globeles have been discovered and since there are very few of them, analyses have not been made. The globules are the result of melting of meteoritic matter during passage through the earth's atmosphere, and were part of the smoke-train of fire-ball that settled on the earth's surface and became mixed with the soil.

What you get: Tunguska witnessed fall commemorative coin as shown.

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Tunguska

Basic information

Name: Tunguska
This is NOT an official name: Doubtful meteorite.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes
Year fell: 1908
Country: Russia
Mass: 13.4 g

Classification
history:

Meteoritical Bulletin:	MB 5	(1957)	Unknown
NHM Catalogue:	5th Edition	(2000)	Unknown
MetBase:	v. 7.1	(2006)	Unknown
Recommended:			Unknown