New study suggests Earth’s recent minimoon originated from the moon

Near-Earth asteroid 2024 PT5 is in an Earth-like orbit and remained very close to Earth for several months at the end of 2024.

2024 PT5 captured a brief flyby from September 29 to November 25, 2024. Image credit: University of Colorado.

2024 PT was first detected on August 7, 2024 by the NASA-funded Asteroid Terrestrial Last Alert System (ATLAS) telescope at the University of Hawaii in Sutherland, South Africa.

This asteroid poses no danger to Earth, but its orbit around the sun closely matches that of our planet.

The object, which is about 10 meters (33 feet) wide, appears to be composed of rock that broke off from the moon’s surface and was ejected into space after a major impact.

“There was a general idea that this asteroid might have come from the moon, but when we discovered that this asteroid is rich in silicate minerals, it became conclusive proof. The silicate minerals are not the kind found on asteroids, but rather the ones found in the moon’s rocks. Dr. Teddy Kaleta Astronomer at Lowell Observatory.

“It doesn’t seem to have been in space very long, perhaps only a few thousand years, because there was no cosmic weathering to cause its spectrum to turn red.”

Using observations from the Lowell Discovery Telescope and NASA’s Infrared Telescope Facility (IRTF) at Mauna Kea Observatory in Hawaii, Dr. Kaleta and his colleagues show that the spectrum of sunlight reflected from the surface of 2024 PT does not match its spectrum. showed. A known asteroid type. Instead, the reflected light more closely matched the moon’s rocks.

This discovery doubles the number of known asteroids thought to originate from the Moon.

“Asteroid 469219 Kamooarewa was discovered in 2016 in an Earth-like orbit around the sun, indicating that this asteroid may also have been ejected from the lunar surface after a major impact,” the astronomers said. said.

“As telescopes become more sensitive to smaller asteroids, more potential lunar boulders will be discovered, and scientists studying the moon as well as scientists studying rare asteroid populations will It creates exciting opportunities for everyone.”

“If a lunar asteroid could be directly related to a specific impact crater on the Moon, studying it could provide insight into the cratering process on the pockmarked lunar surface.”

“Also, material collected from deep on the moon’s surface in the form of asteroids passing close to Earth could be available to future scientists for study.”

“This is a story about the moon told by asteroid scientists,” Dr. Kaleta said.

“It’s an unusual situation where we go out to study asteroids and end up wandering into new territory in terms of the questions we can ask for PT5 in 2024.”

of findings On January 14, 2025, Astrophysics Journal Letter.

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Theodore Caleta others. 2025. On the origin of the near-Earth asteroid moon2024 PT5. APJL 979, L8; doi: 10.3847/2041-8213/ad9ea8

Source: www.sci.news

Scientists believe that Earth’s recent discovery of a new mini-moon indicates significant potential for space mining.

Our planet’s new small satellite, 2024 PT5, arrived in Earth’s orbit on September 29, 2024.

2024 PT5 is scheduled to capture a temporary flyby from September 29th to November 25th in 2024. Image credit: University of Colorado.

2024 PT5 was discovered by the Asteroid Earth Impact Final Warning System in Sutherland, South Africa on August 7, 2024.

This near-Earth asteroid is about 10 meters (33 feet) in diameter and follows an orbit similar to that of 2022 NX1.

2024 PT5 will become a mini-Earth satellite on September 29 and return to heliocentric orbit 56.6 days later on November 25.

“Near-Earth objects like this offer a glimpse into the formation process of the solar system,” said astrophysicist Dr. Nico Cappellutti. University of Miami.

“Most asteroids in our solar system are rocky remnants left over from the formation of our solar system.”

2024 PT5 is part of Arjuna, an asteroid belt made up of space rocks that follow an orbit around the sun very similar to Earth’s orbit.

“So sometimes they can remain temporarily trapped in our gravitational field,” Dr. Cappellutti said.

“Bringing them this close is a fascinating opportunity.”

“The asteroid, the size of a school bus, is too faint and small to be seen with the naked eye or with amateur telescopes, but its two-month stay around Earth has reinforced our intense interest in space rocks. It helps maintain.”

Two years ago, in what was called the first test of the planetary defense system, NASA crashed a spacecraft into the giant space rock Dimorphos, which could change direction if the asteroid was on a collision course with Earth. proved something.

Private companies also want to send spacecraft to asteroids in hopes of mining the precious metals they contain.

“Asteroids are classified based on their orbits and their contents,” said Dr. Bertrand Dano, also from the University of Miami.

“Some are made entirely of stone, while others contain high concentrations of rare metals, such as platinum and gold for electronics, nickel and cobalt for catalysts and fuel cell technology, and, of course, iron.”

“Mining asteroids is not far off. There are currently millions of asteroids in our solar system, about 2 million of which are larger than 1 km.”

“The resources it contains are a new dream for El Dorado, and there are several companies currently betting on it.”

“Recent missions to rendezvous with, orbit and land on asteroids have proven that space mining may be only a matter of time.”

“However, proceeding with asteroid mining will require huge investments, from the mining equipment that needs to operate in a vacuum to the technology needed to transport the extracted minerals to Earth.”

“And then there’s the spacecraft itself. A dedicated ship that would travel to an asteroid for the purpose of extracting minerals from the asteroid would probably be a robotic ship.”

“A trip to Mars would take about eight months under the best conditions. The space and equipment needed to support life would be put to good use as storage for backup equipment and resources.”

“Because it takes a lot of energy to leave Earth’s gravity, mining missions are better launched from space or from low-gravity bodies such as the Moon, Mars, or Titan, one of Saturn’s natural moons. Sho.”

“Returning to Earth is relatively easy, but dangerous for the material. It would be a shame if all the prizes disappeared. Refining will take place in space, and purified products can be shipped regularly. As far as I know, no one is thinking that far.”

“Yet, asteroid mining could have a 100-fold or more return.”

“Mining platinum or gold from an asteroid and returning it could make you a trillionaire overnight, potentially upending entire economies, trade and markets.”

“Astrophysicist Neil deGrasse Tyson once said, ‘The first billionaire in history was the one who exploited the natural resources of asteroids.'”

Source: www.sci.news