The Bendegó Meteorite (also known as Pedra do Bendegó or simply Bendengó) is a
meteorite
A meteorite is a solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or Natural satellite, moon. When the ...
found in the interior of the state of
Bahia
Bahia ( , , ; meaning "bay") is one of the 26 Federative units of Brazil, states of Brazil, located in the Northeast Region, Brazil, Northeast Region of the country. It is the fourth-largest Brazilian state by population (after São Paulo (sta ...
,
Brazil
Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...
. It is the biggest
iron meteorite
Iron meteorites, also known as siderites, or ferrous meteorites, are a type of meteorite that consist overwhelmingly of an iron–nickel alloy known as meteoric iron that usually consists of two mineral phases: kamacite and taenite. Most iron met ...
ever found in Brazilian soil, weighting . It has been on display at the
National Museum of Brazil
The National Museum of Brazil ( pt, Museu Nacional) is the oldest scientific institution of Brazil. It is located in the city of Rio de Janeiro, where it is installed in the Paço de São Cristóvão (Saint Christopher's Palace), which is in ...
, in
Rio de Janeiro
Rio de Janeiro ( , , ; literally 'River of January'), or simply Rio, is the capital of the state of the same name, Brazil's third-most populous state, and the second-most populous city in Brazil, after São Paulo. Listed by the GaWC as a b ...
, since 1888.
It survived the
fire
Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction Product (chemistry), products.
At a certain point in the combustion reaction, called the ignition ...
that destroyed the museum in 2018, sustaining no major damage.
[''Brazil National Museum fire: Key treasures at risk'' 3 Sep 2018]
/ref>
Discovery
The Bendegó meteorite was found in 1784 by the boy Domingos da Motta Botelho, who grazed cattle on a farm near the present town of Monte Santo, Bahia. At the time of its finding, it was the second largest meteorite in the world. Judging from the four-inch layer of oxidation
Redox (reduction–oxidation, , ) is a type of chemical reaction in which the oxidation states of substrate change. Oxidation is the loss of electrons or an increase in the oxidation state, while reduction is the gain of electrons or a d ...
upon which it rested, and the lost part of its lower portion, it is estimated that it had been in place for thousands of years.[AGUIAR, Durval Vieira. ''Descrição Prática da Província da Bahia'', ]Salvador
Salvador, meaning "salvation" (or "saviour") in Catalan, Spanish, and Portuguese may refer to:
* Salvador (name)
Arts, entertainment, and media Music
*Salvador (band), a Christian band that plays both English and Spanish music
** ''Salvador'' ( ...
1888
Transport to Museum
News of the finding quickly spread. In 1785, governor D. Rodrigues Menezes arranged for it to be transported to Salvador
Salvador, meaning "salvation" (or "saviour") in Catalan, Spanish, and Portuguese may refer to:
* Salvador (name)
Arts, entertainment, and media Music
*Salvador (band), a Christian band that plays both English and Spanish music
** ''Salvador'' ( ...
, however, the meteorite's excessive weight made transportation difficult. The cart it was on ran out of control down a hill and the meteorite fell into a dry stream bed, 180 meters away from the spot where it was originally found. It remained there until 1888, when it was recovered and brought to the National Museum.[
]
Description and composition
The meteorite is an irregular mass, reminding, in appearance, an asteroid
An asteroid is a minor planet of the inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic or icy bodies with no atmosphere.
...
. It has numerous depressions on the surface and cylindrical holes oriented parallel to its greater length. These holes were formed by the burning of the troilite
Troilite is a rare iron sulfide mineral with the simple formula of FeS. It is the iron-rich endmember of the pyrrhotite group. Pyrrhotite has the formula Fe(1-x)S (x = 0 to 0.2) which is iron deficient. As troilite lacks the iron deficiency whic ...
, during the transatmospheric passage of the meteorite, since the sulfide has a lower melting point than the rest of the meteorite, consuming more quickly. It is a metallic meteorite, consisting basically of iron, with the following elements: 6.6% Ni, 0.47% Co, 0.22% P, and traces of S and C in much smaller quantities, only measured in parts by million.
See also
* Collection of meteorites in the National Museum of Brazil
* Glossary of meteoritics
This is a glossary of terms used in meteoritics, the science of meteorites.
#
* 2 Pallas – an asteroid from the asteroid belt and one of the likely parent bodies of the CR meteorites.
* 4 Vesta – second-largest asteroid in the asteroid b ...
* List of largest meteorites on Earth
This is a list of largest meteorites on Earth. Size can be assessed by the largest fragment of a given meteorite or the total amount of material coming from the same meteorite fall: often a single meteoroid during atmospheric entry tends to fragmen ...
* Bendegó meteorite (report)
External links
Os 10 maiores meteoritos encontrados no Brasil
References
{{DEFAULTSORT:Bendegó Meteorite
Meteorites found in Brazil
National Museum of Brazil
1784 archaeological discoveries