This asteroid that recently passed through Earth reveals its secrets

Recently, experts from the University of Arizona conducted research to better understand the classification of near-Earth asteroids. The object of the study is an asteroid named 1998 OR2 that was observed thanks to a telescope Raptors, from Kuiper Space Science.

The asteroid near Earth is about half a mile in diameter passed near the ground last year. The aim of the research was to understand the phenomenon of shock darkening. In fact, when a meteor enters collision with the earth’s crustThe effect generates strong heat which leads to blackening of the celestial body. However, not all cosmic stones are responsible for this phenomenon. Adam Battle, a graduate student at the University of Arizona, was the lead author of the research. The various conclusions of the study were published in the journal Planetary Science Journal.

In Search of the True Nature of 1998 OR2

Space observations reveal that meteorites are frequently exposed to a High Impact Frequency. However, it is rare to distinguish the effects of melting on meteorites from these celestial bodies. The asteroid lesson was Characteristics of an ordinary comet chondrite Because of its lightweight appearance.

Cosmic stones in this category are rich in olive and pyroxene. Unexpectedly, data analysis suggests that the asteroid was rather Carbon type, known as dark appearance.

In response to these discrepancies in the classification of celestial bodies, extensive research has been conducted. according to Astronomy scientiststhe meteor is actually Ordinary chondrite, with special mineralogy. Maybe it would be Changed due to shock darkening. This phenomenon will later make a strong analogy with a carbonaceous planet.

Ordinary asteroids show a carbonaceous texture if subjected to impact blocking. »

Vishnu Reddy, Professor of Planetary Science

Meteorite transformation will be due to spatial weathering

Since its appearance in 1980Trauma darkening has only been studied in 2013 After a meteorite explosion in Russia. Scientists revealed dark planets In the main asteroid series. On Earth, astronomers estimate that 2% of ordinary meteorites I was affected.

The carbon profile of 1998 OR2 can be explained by spatial weathering. In fact, Exposure to this medium could have led to changes in the meteorite. However, this possibility would give an imperceptibly redder side toasteroid. So the opacity from impact can remove the appearance of olivine and pyroxene while giving the cosmic stone a carbonaceous appearance.