Detection of a two-meter asteroid before it collides with Earth 2022 EB5

At 10:23 p.m. on the 11th, a two-meter asteroid collided with the atmosphere and disappeared into the sky southwest of Jan Mayen, a Norwegian volcanic island in the Arctic Ocean.

Collisions of asteroids so small that they don’t pass through Earth’s atmosphere and disappear are frequent and go unnoticed, but this asteroid, dubbed “2022 EB5,” looks even more special.

Indeed, it is the fifth asteroid that pinpoints the location and timing of the collision, determining its orbit before it collides with Earth.

▲ EB5 2022 crash path.

According to the National Aeronautics and Space Administration (NASA) in the 16th century, EB5 was first identified at the Fiskesteteus Observatory in northern Hungary two hours before the collision and at the Asteroid Center of the International Astronomical Union (MPC) (IAU). o MPC NEO was immediately added to the list of additional observations.

NASA’s “Scout” asteroid impact assessment system, designed to automatically search the MPC list, calculate the orbit based on the initial observation data, and therefore it was confirmed that it would collide with the Earth’s atmosphere. CNEOS) and other relevant organizations were promptly informed and additional comments were provided.

The scouts initially expected them to collide with western Greenland, but as more sightings were made, they moved the collision location to the Norwegian coast.

EB5 2022 was too small to form a spark or explosion visible from Earth at the time of atmospheric impact, but infrasound confirmed it collided at the location and time that explorers had predicted.

Based on the data observed during its approach to Earth and the energy measured by infrasound, 2022 EB5 turned out to be a small asteroid less than two meters high.

Asteroids this size aren’t bright enough to see until they’re close to Earth.

“There are countless asteroids as small as 2022 EB5. They can only be detected when they are falling, so only a small fraction of them are found and observed before impact,” said Paul Cordas, director of the CNEOS.

The first sighting of an asteroid before its collision with Earth was 2008 TC3, which hit Sudan in October 2008. The asteroid, which is about 4 meters wide, collided with the atmosphere and entered into collision with hundreds of small meteorites that fell in the Nubian desert.

2022 EB5 is the fifth asteroid to be observed before the collision, but it is expected to increase as NEO observing technology develops.

NASA said that although EB5 2022 did not arrive on Earth due to its small size and disappearance, it helped form the Earth’s defense formation and provided an opportunity to confirm the reliability of the asteroid impact risk assessment system.

International Team

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