Angra dos Reis meteorite
| Angra dos Reis | |
|---|---|
Observed fall | Yes |
| Fall date | 20 January 1869 |
| TKW | 1.5 kilograms (3.3 lb) |
The Angra dos Reis meteorite is the type specimen of the angrite group. It was observed when it fell to earth in 1869.[1]
Discovery and naming
The meteorite is named after Angra dos Reis, a municipality of Rio de Janeiro, Brazil. It fell on 20 January 1869 into the bay where the water was about 2 meters deep. Two fragments were found by a diver the next day.[2]
Museum
The National Museum of Brazil holds the meteorite as part of its meteorite collection. After the museum's 2018 fire, there were concerns that it was lost in the rubble of the museum.[3][4] Some meteorites were found on October 19, 2018, including the Angra dos Reis.[5]
Mineralogy
Although it is the type specimen of the
calcium-aluminium-rich inclusions found in the Allende meteorite. The reason for this exotic composition is thought to be partial melting of a chondritic precursor under reduction-oxidation (redox) conditions in which meteoric iron is unstable.[6]
References
- ^ "Angra dos Reis". Meteoritical Society. Retrieved 3 January 2013.
- ^ "Angra dos Reis". Meteoritestudies. Retrieved 3 January 2013.
- ^ "Meteorito de R$ 3 milhões segue perdido nos escombros do Museu Nacional" (in Portuguese). 25 September 2018.
- ^ "O meteorito que vale R$ 3 milhões e está perdido nos escombros do Museu Nacional" (in Portuguese). 25 September 2018.
- ^ "Meteorito que vale milhões de reais é recuperado dos escombros do Museu Nacional" (in Portuguese). 25 September 2018.
- ^ "The Angrite Meteorite Mystery" (PDF). NASA. Archived from the original (PDF) on 2012-09-17. Retrieved 2013-01-03.
