A recently discovered asteroid, 2024 YR4, has raised concerns among astronomers after NASA confirmed its increasing probability of colliding with the planet Earth. Initially discovered on December 27, 2023, by Chilean El Sauce Observatory, 2024 YR4 now carries a 3.1% chance of hitting Earth on December 22, 2032 according to the recent reports. It is the most significant impact threat ever recorded by available asteroid tracking technology.
Although the asteroid is not large, ranging from 130 to 300 feet, its potential impact is nevertheless capable of creating extensive destruction. With this increased likelihood, the asteroid has become the focus of scientists tracking possible space threats. Even with the danger, NASA continues to observe its path keenly.
Asteroid 2024 YR4: Its potential impact and size could cause massive damage
The asteroid 2024 YR4 is estimated to be between 130 to 300 feet in diameter, which is about the height of the Statue of Liberty.
It is not large enough to destroy the world, but if this asteroid is going to impact, its impact would result in severe local damage. Its speed will be approximately 40,000 miles per hour, which will generate the energy outflow equivalent to eight megatons of TNT. That is 500 times more powerful than the Hiroshima bomb, and the explosion could very well annihilate a whole city.
Asteroid 2024 YR4: Recent observations by NASA and ESA
NASA and the European Space Agency (ESA) are tracking the asteroid's trajectory closely. To date, NASA's impact risk is at 3.1%, although the ESA puts it at 2.8%. Scientists have however reaffirmed that the problem is not one of an immediate crisis.
"This is not a crisis today," said Richard Moissl, head of ESA's planetary defense bureau. "This is not the dinosaur killer. This is not the planet killer. This is the worst case for at most a city."
This follows the International Asteroid Warning Network (IAWN), which issued a warning memo on 29th January after odds of impact greater than 1%. The scientists continue to calculate the figures with new data landing on their fingertips. Earlier, additional observations had already brought risks down to zero for other asteroids.
NASA releases potential impact zones of asteroid 2024 YR4 on Earth
NASA had forecasted a risk corridor for 2024 YR4, encompassing the most densely populated regions.
These are the areas of the eastern Pacific, northern South America, the Atlantic, Africa, the Arabian Sea, and South Asia. The largest cities in these areas, such as Mumbai, Kolkata, Dhaka, Bogotá, Abidjan, Lagos, and Khartoum, fall within this risk corridor and over 110 million individuals. These are the type of areas where an impact would result in widespread killing and loss of infrastructure.
Los Alamos National Laboratory physicist Mark Boslough said the uncertainty of predicting the potential harm of the asteroid. "We don't know how porous or dense it is, so its mass, and therefore the energy it would emit if it blows up on the surface of the Earth or blows up in the atmosphere, is unknown," he explained. The asteroid's composition remains the determining factor for predicting its ultimate destructive potential.
Asteroid 2024 YR4 vs Apophis: A smaller asteroid poses bigger airburst risk
2024 YR4 has outpaced the previous threat of collision on Earth posed by asteroid 99942 Apophis originally having a 2.7% probability of colliding with Earth on April 13, 2029. The threat was decreased following re-calculations until it fell to zero and exorcised the anxiety of its impact. However, scientist Paul Wiegert revealed that any small impact by any small asteroid would alter Apophis's trajectory and re-birth the impact threat onto Earth.
While Apophis is significantly larger with a diameter of approximately 1,100 feet, 2024 YR4 is small but large enough to be devastating. If it were to hit the ground, the most probable event is an airburst—a release of energy in the air—rather than impact on the ground. This would release energy equal to or larger than the Tunguska explosion in 1908, which cleared 800 square miles of Siberian forest.
NASA plans to track asteroid 2024 YR4 with advanced technology
As the parameters of asteroid 2024 YR4 are like that, NASA has sent the finest equipment available to find out a bit more about it. The James Webb Space Telescope will start tracking the asteroid and offering more precise information regarding where it is located and what it is made up of in March 2025.
"Web can see really, really tiny things," testified The Planetary Society's chief scientist Bruce Betts in emphasizing the telescope's remarkable capability to observe distant objects in space. Furthermore, Earth telescopes will monitor the asteroid until April 2025 when 2024 YR4 becomes too dim to be seen until June 2028. These observations contribute to risk assessment and understanding of the asteroid's orbit.
Asteroid 2024 YR4 risk manageable, says NASA
NASA has assured the public that there is always enough time to act even in the worst-case situation. NASA tested and demonstrated asteroid deflection technology in 2022 with the DART mission, which successfully deflected a harmless asteroid from its trajectory. If need be, the same could be accomplished to deflect asteroid 2024 YR4 off its collision course with Earth.
Despite the danger being posed by the asteroid, there is optimism by NASA. Most of the items on its initial list of asteroids posing impact-hazard have been eliminated as threats upon being sighted, stated the space agency. Though in 2024 YR4 remains the lone asteroid with odds greater than a 1% chance to impact the planet, researchers anticipate even more information eliminating the danger from consideration.
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