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International Asteroid Day: What do your experts want to know about the threat



Hawaiian astronomers used the ATLAS and Pan-STARRS telescopes to find a small asteroid before entering the Earth's atmosphere on the morning of June 22.

The asteroid, named 2019 MO, has a diameter of 13 feet and 310,685 miles of Earth. ATLAS watches it four times for 30 minutes around midnight in Hawaii.

Initially, the Scout Impact Analysis Software at NASA's Jet Propulsion Laboratory considered the potential impact on 2. For reference, 0 was "unlikely" and 4 was "probable." Davide Farnocchia, a JPL naval engineer, requested additional observations because he saw a discovery near Puerto Rico 12 hours later.

The Pan-STARRS telescope was also working and catching part of the sky where the asteroid could be seen.

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Additional images from the Pan-STARRS telescope helped the researchers better define the path of the asteroid that hit the Scout's 4th ranking.

The calculation coincided, and the San Juan meteorological radar opened the asteroid that burned in our atmosphere. He entered the ocean atmosphere, 236 miles south of the city.

ATLAS, which is two telescopes 100 miles away from the Big Island and Maui, scans the whole sky every two nights for asteroids that can affect the Earth. He may notice small asteroids half a day before arriving on the Earth and pointing to larger asteroids a day. 2019 MO is small enough to burn in the atmosphere.

Although the knowledge of their abilities and definitions of the asteroid have been developed after the fact, astronomers believe that ATLAS and Pan-STARRS can help to predict more in the future.

Asteroid Missions

Knowledge of the size and orbit of the asteroid is the main battle, as this allows forecasting.

A few years ago, the Large Synoptic Research Telescope will be on the Internet and will allow the discovery of tens of thousands of asteroids in orbit that could bring them closer to Earth, said Ed Lou, Executive Director of the Asteroid Institute and former NASA astronaut . ” data-src-mini=”//cdn.cnn.com/cnnnext/dam/assets/190501115321-itokawa-asteroid-small-169.jpg” data-src-xsmall=”//cdn.cnn.com/cnnnext/dam/assets/190501115321-itokawa-asteroid-medium-plus-169.jpg” data-src-small=”http://cdn.cnn.com/cnnnext/dam/assets/190501115321-itokawa-asteroid-large-169.jpg” data-src-medium=”//cdn.cnn.com/cnnnext/dam/assets/190501115321-itokawa-asteroid-exlarge-169.jpg” data-src-large=”//cdn.cnn.com/cnnnext/dam/assets/190501115321-itokawa-asteroid-super-169.jpg” data-src-full16x9=”//cdn.cnn.com/cnnnext/dam/assets/190501115321-itokawa-asteroid-full-169.jpg” data-src-mini1x1=”//cdn.cnn.com/cnnnext/dam/assets/190501115321-itokawa-asteroid-small-11.jpg” data-demand-load=”not-loaded” data-eq-pts=”mini: 0, xsmall: 221, small: 308, medium: 461, large: 781″ src=”data:image/gif;base64,R0lGODlhEAAJAJEAAAAAAP///////wAAACH5BAEAAAIALAAAAAAQAAkAAAIKlI+py+0Po5yUFQA7″/>
crashing in the moonlight of Didymos – An asteroid on Earth that is comparable in size to an asteroid that could pose a threat The extra mission of the European Space Agency Hera will accurately measure how it has changed the speed of the larger asteroid and will study the crater of the impact the DART of the lunar st etl.

Asteroid Awareness

asteroid impact, focusing on the real danger of asteroids that can collide with the Earth. In 1908, a powerful asteroid struck the area of ​​the Podkamenna Tunguska River in a remote Siberian forest in Russia. The event equaled the trees and destroyed forests at 770 square miles, almost three-quarters of the state of Rhode Island. The impact throws people to the ground in a city 40 miles away. The waves of waves spread all over the world, and "bright clouds" were visible.

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NASA recently reviewed the "cold case" of the Tunguska strike.

The influence has happened in such a remote area that only a few people have seen it. The media then speculated that it might have been a volcanic eruption or a mining event. The idea of ​​an asteroid strike seemed overwhelmed, NASA said in a statement.

Research was not conducted around the impact area until the 1920s. But researchers can not find fragments of asteroids or craters.

"Tunguska is the largest cosmic impact witnessed by modern humans," said David Morrison, a research scientist at the NASA AMAS Research Center. "This is also characteristic of the type of impact we will probably have to defend against in the future."

Six years ago, an asteroid entered the Earth's atmosphere over Chelyabinsk, Russia. It explodes in the air, releasing 20-30 times more energy than the first atomic bombs and generating a luminance greater than the sun. He has damaged more than 7,000 buildings and injured more than 1,000 people. The shock wave broke the windows 58 miles away.

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Researchers modeled events in Tunguska and Chelyabinsk on computers to understand how damage can occur from the entry of asteroids into our atmosphere even when they break into the air. The analysis provides a promising discovery. Four computer models came to a similar picture of what happened in Tunguska. The asteroid was probably rocky, not icy, and between 164 and 262 feet, and has entered our atmosphere at 34,000 miles per hour. This created the energy equivalent of the volcanic eruption of Mount Helens in 1980 between 6 and 9 miles above ground. Researchers have found that the interval between such devastating potential asteroid effects on Earth is one of millennia, not centuries, based on the known asteroid population.

"As there are so few observed cases, there remains a lot of uncertainty about how large asteroids break down into the atmosphere and how much damage they could cause on the ground," said Lorien Wheeler, a NASA researcher working at the agency's asteroid Threat Assessment Project. "New advances in computational models, along with Chelyabinsk and other weather events, help improve our understanding of these factors so we can better assess potential asteroid threats in the future."


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