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Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ A brilliant meteor during the day, blasted over Cuba this month. That's where it came from

A brilliant meteor during the day, blasted over Cuba this month. That's where it came from



Astronomers have just received the articles of the meteor that ignited Cuba earlier this month.

The day sky sky blinded thousands of people in West Cuba on February 1. Many of these people have taken footage of the meteor or the path of debris they left after burning, allowing the reconstruction of the rock rock path.

"We were very happy that at least three relatively reliable videos, including one of incredible quality, could be available on the Internet for such a short time," Jorge Zuluaga, Professor at the Institute of Physics (IoP) at the University of Antiochia in Colombia, says in a statement. "Reconstruction of the trajectory of a meteor requires at least three observers on earth," added Zuluaga. "Although several satellite images have been recorded and are available online without any observations from the ground, precise reconstruction is not possible."

A trajectory of the meteor falling over Cuba on February 1, 2019, as reconstructed by a team of Colombian astronomers.

Zuluaga and his team found that the meteor had entered the Earth's atmosphere about 47.5 miles (76.5 kilometers) above the Caribbean Sea, at a point from 26 miles (26 km) near the southwest coast of Cuba. At that time, the rock, believed to be a few meters wide and weighed around 360 tonnes (330 metric tons), traveled approximately 40,800 km / h (64,800 km / h), the researchers found. northeast in a relatively straight line. When the object reached a height of 17.1 miles (27.5 km), it developed a smoke trail of burnt debris that attracted the view of countless observers on the ground.

The NOAA GOES-16 Geostationary Onboard Lighting Instrument captures this view of the meteor on February 1 over Cuba (a small blue color at the bottom center), The larger blue arc in the top left corner is a flash over the Gulf of Mexico .

At an altitude of 13.7 miles (22 km), the researchers estimated the meteor burst into an air bang. Hundreds of small pieces ran down the island. Many of these spacecrafts landed in Vinyles Nature Park, near the western end of Cuba, but some pieces struck houses in the region. If a large part survives the collapse, it probably has landed in the ocean on the northwest coast of the island, scientists say. They found that it initially occupied an elliptical orbit with an average distance from the sun of 1.3 astronomical units. (An astronomical unit, or AU, is the average distance of the Sun Earth – about 93 million miles or 150 million kilometers). The rock took 1,32 years to complete an orbit around our star.

The scientists used similar methods to reconstruct the road of the site exploding over the Russian city of Chelyabinsk in February 2013, 400 times brighter than the recent Cuban event, and the ex-blast was much Powerful: The shock wave smashed thousands of windows in Chelyabinsk, injuring at least 1,200 people with fragments of flying glass. arXiv.org and the researchers also tested the method developed last year by Zuluaga and colleague IoP researcher Mario Sucerquia (who is also the author of this article).

This method, called gravitational tracking (GRT), uses computer algorithms to track model beats back to their origin in space. Researchers marked patterned rocks that were in orbit similar to those of real earth asteroids thinking that such real-world orbits would have a decent opportunity to produce rocks that affect the Earth.

did a good job of "predicting" Chelyabinsk and Cuba meteors, the researchers said. For example, BRT models suggest that a striker striking Chelyabinsk will probably arrive from a part of the sky to the northeast of that place at an angle of 20 degrees to the horizon. The real object came from the east, at an angle of just 20 degrees.

Two examples are not enough to prove that the method works, of course. But that's the beginning, team members said.

"Only after the recent digital boom did we realize how often and potentially dangerous the impact of small meteorites on settlements," said Sucerquia in the same statement . "Unfortunately, we can not yet protect our society against these threats, and our work suggests that in principle we can be prepared, at least with some knowledge, for future impacts." The book of Mike Wall for the search for extraterrestrial life, outside "(Grand Central Publishing, 2018, illustrated by Carl Tate ) is no longer available. Get it on Twitter @michaeldwall Follow us on Twitter @Spacedotcom or Facebook
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