Thursday , September 19 2019
Home / philippines / On the International Asteroid Day, here's what to know about …

On the International Asteroid Day, here's what to know about …




(CPA) "For the first time astronomers have shown that telescopes could provide enough warning so that people could move away from the asteroid attack on Earth.

Astronomers from Hawaiian universities have used telescopes ATLAS and Pan-STARRS to detect a small asteroid before entering the atmosphere in the morning of June 22nd.

The asteroid, named 2019 MO, was 13 feet in diameter and 310,685 miles from Earth. The ATLAS facility watched him four times over 30 minutes around midnight in Hawaii.

Initially, Scout's software for impact analysis at NASA Jet Propulsion Laboratory considered potential impact as 2. For reference, 0 is "unlikely" and 4 is "probable". Davide Farnocchia, a navigation engineer at JPL, asked for additional observations as he noticed a detection near Puerto Rico 12 hours later.

The Pan-STARRS Telescope also worked and captured a part of the sky where the asteroid could be seen.

Additional images from the Pan-STARRS telescope helped researchers better determine the asteroid entry path, which hit the Scout scoring at 4.

The calculation coincides, and the weather radar in San Juan discovered the asteroid burning in our atmosphere. She entered the atmosphere across the ocean, 236 miles south of the city.

ATLAS, two telescopes located 100 miles off the Great Island and Maui, scans the entire sky every two nights because of asteroids that could affect the Earth. It can observe small asteroids half a day before they reach Earth and can point to larger asteroids a few days ago. 2019 MO was small enough to burn in the atmosphere.

Although knowledge of their abilities and asteroid definitions was elaborated afterwards, astronomers believe that ATLAS and Pan-STARRS could predict more in the future.

Asteroid missions

Knowing the magnitude and the asteroid's orbit is the main battle, because it allows prediction.

In a few years, the big synoptic telescope will come online and allow the discovery of tens of thousands of asteroids in orbits that could bring them closer to Earth, said Ed Lu, executive director of the Asteroid Institute and former astronaut NASA.

"This is an exciting time for planetary defense, because we are on the verge of absolute flooding of new observations that will allow us to track 10 times more asteroids than we've ever been," Lu said. "In about two years, LSST will be included, and the rate of discovery will be more than any other telescope. In the first year, it will find tens of thousands of asteroids and will be able to track them."

Missions such as NASA's OSIRIS-REX and Japanese Hayabusa2 explore asteroids in our solar system and try to return the Earth's patterns in the coming years. A camera near the Earth, called NEOCam, is characterized by facilities close to the Earth.

Other missions are planned. NASA's DART, which stands for the Double Asteroid Redirection Test, is a planetary defense test to prevent the asteroid attack on Earth. DART, who opened the launch window in July 2021, will visit the binary system of asteroids and try to turn a small asteroid.

DART will collapse in the moonlight of Didymos, an asteroid close to Earth, which is comparable to the asteroid that could pose a threat. The complementary mission of the Hera European Space Agency will accurately measure how it has changed the speed of a larger asteroid and studied DART's crater on a monthly basis.

Asteroid Awareness

Sunday is the International Day of the Asteroid, marking the largest recorded Earth's impact on the asteroid while focusing on the real danger of asteroids that can collide with Earth.

In 1908, a powerful asteroid hit the Podkamennaya Tungusko area in the remote Siberian forest in Russia. The event struck trees and destroyed more than 770 square miles of forest, nearly three-quarters of the US Rhode Island area. The strike has thrown people to the ground in the city 40 miles away. Shock waves sprang around the globe and saw "shiny clouds".

NASA recently reviewed the "Cold Case" strike in Tunguska.

The impact took place in such a remote area that only a few dozen people even saw it. The media then speculated that it could have been a volcano eruption or a mining accident. The idea of ​​an asteroid strike was exaggerated, NASA said in a statement.

Scientific research has not been conducted around the area of ​​influence until the 1920s. But the researchers could not find the fragments of the asteroid or the crater.

"Tunguska is the greatest cosmic influence of modern people," said David Morrison, a research scientist of planetary scientists at NASA's Ames Research Center. "It is also a feature of the influence we will probably have to protect in the future."

Six years ago, the asteroid entered the Earth's atmosphere through Chelyabinsk, Russia. It exploded in the air, releasing 20 to 30 times more energy than the first atomic bomb and creating light higher than the sun. More than 7,000 buildings were damaged and more than 1,000 people injured. The striking wave broke the windows 58 miles away.

She left undiscovered because the asteroid came from the same direction and way as the sun.

And that explains why astronomers and Asteroid groups want people to be aware. According to Pew's survey, 62% of adults in the US believe that one of the major priorities of NASA would be to track asteroids or objects that could hit the Earth.

NASA and other space organizations around the world are focusing on detecting the dangers of near-Earth or NEO objects, asteroids, and comets whose orbits are located within 30 million miles of Earth.

There are no known NEOs that report a significant threat. The NASA NEO program finances and relies on discovering and monitoring the efforts of observers across the country and the universe and cooperating with observatories all over the world.

Researchers have modeled the events in Tungus and Chelyabins on computers to understand how asteroid damage can enter into our atmosphere, even when they are disintegrating in the air.

The analysis was a promising discovery. Four computer models have come up with a similar picture of what happened in Tunguska. The asteroid was probably rocky, was not ice, and was between 164 and 262 feet, and entered our atmosphere at 34,000 miles per hour. It generated energy equivalent to the volcanic eruption of Mount Helen in 1980, between 6 and 9 miles above the ground.

Researchers have found that the interval between such devastating potential impacts of asteroids on Earth is one of the millenniums and not centuries, based on the known asteroid population.

"Due to the low number of cases observed, there remains much uncertainty as to how big asteroids decompose into the atmosphere and how much harm they can cause on the ground," says NASA researcher Amore Lorien Wheeler, who works on the Asteroid threat assessment project. , "However, recent achievements in computer models, along with event analyzes in Chelyabinsk and other meteoric events, help improve our understanding of these factors so we can better assess potential asteroid threats in the future."

CNN-Wire ™ and © 2019 Cable News Network, Inc., a Time Warner company. All rights reserved.


Source link