Sign in Subscribe
Asteroids

Earth's Temporary Mini-Moon: A Rare Occurrence Revealed

Strategic Insights

— 2 min read

Asteroid 2024 PT5 will be orbiting the Earth as a mini-moon from September 29 to November 25, making its closest approach at a distance of about 2.5 million miles away. This temporary satellite was discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS) in August and is expected to complete a "horseshoe path" around Earth in the next two months. The asteroid's capture by the Earth's gravity is a rare occurrence, and scientists believe that many more mini-moon events may exist, but have not been documented.

Key Takeaways:

  • Asteroid 2024 PT5, a mini-moon, will be orbiting Earth from September 29 to November 25, with its closest approach at 2.5 million miles away.
  • The asteroid was discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS) in August and is expected to complete a "horseshoe path" around Earth in the next two months.
  • The capture of asteroid 2024 PT5 by Earth's gravity is a rare occurrence, with at least two other short events documented in scientific studies in 1991 and 2022.
  • A mini-moon event requires a specific alignment of physics, with the object coming close to Earth at a relatively slow pace (about 2,200 mph).
  • The asteroid will not become a permanent second moon around Earth due to the tug-of-war with the sun.
  • Advanced surveys, such as ATLAS, are helping to detect and track small objects like asteroid 2024 PT5.
  • The discovery of asteroid 2024 PT5 highlights the importance of tracking objects flying around Earth for potential danger.
  • NASA's Double Asteroid Redirection Test (DART) investigation team successfully deflected a 530-foot asteroid in a proof-of-concept demonstration.

Statistics:

  • At least two other short mini-moon events have been documented in scientific studies, in 1991 and 2022.
  • The asteroid will be orbiting Earth at a distance of about 2.5 million miles away during its closest approach.
  • The asteroid is expected to complete a "horseshoe path" around Earth in the next two months.
  • The asteroid's speed is approximately 2,200 mph.
  • The asteroid 2024 PT5 is 33 feet long.
  • The asteroid will not pose a threat to Earth, but a large object is expected to have a close encounter with the planet in the lifetimes of some individuals.
  • Asteroids like 2024 PT5 are small and harder to detect, but more advanced surveys like ATLAS are helping to fill in the gaps.

Sources:

  • "Captures like this must occur frequently. They are just hard to detect," said Derek Richardson, an astronomy professor at the University of Maryland.
  • The Asteroid Terrestrial-impact Last Alert System (ATLAS) discovered asteroid 2024 PT5 in August.
  • The study on asteroid 2024 PT5 was recently published, with researchers writing that the asteroid will make a "horseshoe path" around Earth over the next two months.
  • NASA's Double Asteroid Redirection Test (DART) investigation team successfully deflected a 530-foot asteroid in a proof-of-concept demonstration.

Read more