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NASA predicted the entry of an asteroid into our planet this Saturday: this is how it crossed the Canadian sky

A Small Asteroid Reaches the Skies of North America Last Saturday, 19 November. Upon entering Earth’s atmosphere, it broke into small pieces and fell into Lake Ontario in southern Canada.

Due to this, NASA had already detected the arrival of an asteroid named ‘2022 WJ1’. Scout Impact Risk Assessment System, The fireball was about a meter wide and was discovered three and a half hours after it hit the Earth. This was the sixth time in history that humanity managed to track down a meteorite before it hit the planet.



“The planetary defense community really demonstrated its skill and preparedness with its response to this small warning event,” said Kelly Fast, Near-Earth Object Observations Program Manager for the Planetary Defense Coordination Office at NASA Headquarters. NASA (Washington) – Being such a harmless effect easy real world practice And gives us confidence that NASA’s planetary defense systems are capable of reporting a response to the potential for a serious impact by a large object.”

American space agency Ability to detect and track near-Earth objects They are even bigger. Some of them may survive their entry into the atmosphere and damage Earth’s surface, and systems like Scout will help predict and act on them.

In general, potentially dangerous NEOs were detected earlier than the 2022 WJ1. Although it took weeks to locate the asteroid, it posed no threat to the planet and its discovery served to test NASA’s capabilities. Discovery, monitoring, determination of orbits and prediction of impacts.


There is no perfect technique.

Catalina Sky Survey

The Catalina Sky Survey Project, funded by NASA, supported by the Near-Earth Object Observing Program under the Planetary Defense Coordination Office, was the one who detected 2022 WJ1 and notified the Center for Minor Planets, in charge of exchanging information for position measurements of small celestial bodies.

Comet C/2021 A1 (Leonard) imaged by Messier 3 and detected by the Catalina Sky Survey program.
Comet C/2021 A1 (Leonard) imaged by Messier 3 and detected by the Catalina Sky Survey program.
Kevin Legore / Focus Astronomy / Sky Watcher USA

As explained on the Catalina Sky Survey website, its researchers are at the Lunar and Planetary Laboratory of the University of Arizona in Tucson. In addition, they expand what they focus on “Continuous development and application of innovative software” and in the detection of Near Earth Objects and their tracking.

NASA’s role

Following the discovery by the Catalina Sky Survey, NASA turned to its Scout impact risk assessment system, which is maintained by the investment of the Center for Near-Earth Object Studies at the Jet Propulsion Laboratory. Quickly, they updated the new data on their page and started doing Calculate the approximate trajectory of a celestial body and potential impact.


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Scout predicted asteroid seven minutes after it was posted 25% chance of impact on Earth. Their possible collision sites ranged from the Atlantic Ocean to Mexico near the east coast of North America.

Shantanu Naidu, a navigation engineer and scout operator at JPL, said that objects as small as 2022 WJ1 “can only be detected by when they are very close to the earth. In the case of larger meteorites, they are detected first.

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