Asteroid that exploded over Berlin was fastest-spinning space rock ever recorded

Live Science ^ | May 2, 2024 | Sascha Pare

[SunkenCiv]

Scientists have calculated the rotational speed of asteroid 2024 BX1, which exploded over Berlin earlier this year, by letting it trail in images of the sky. It turns out, 2024 BX1 was spinning faster than any other near-Earth object ever seen...

The space rock, dubbed 2024 BX1, turned into a fireball and exploded over Berlin in the early hours of Jan. 21. Although small asteroids on collision courses with Earth are typically detected only when they crash into the atmosphere, scientists spotted this one roughly three hours before impact.

That's not the only way 2024 BX1 was unusual, according to a paper published to the preprint database arXiv on April 5. Researchers think the asteroid, which was traveling 31,000 mph (50,000 km/h), was rotating once every 2.6 seconds — the fastest spin ever seen for an asteroid.

Previously, the record for the fastest-spinning asteroid belonged to a flying rock called 2020 HS7, which showed a rotation period of 2.99 seconds. That asteroid measured between 13 and 24 feet (4 to 8 meters) in diameter, which is slightly bigger than 2024 BX1 and may explain why the latter spun faster...

Devogèle and his colleagues studied the rotational speeds of three asteroids, including 2024 BX1, using images they took as the objects approached Earth. The other two asteroids, 2023 CX1 and 2024 EF, were described based on close calls with our planet recorded on Feb. 13, 2023, and March 4, 2024, respectively.

The researchers developed a new technique to visualize the asteroids' dizzying rotational speeds. The method involved adjusting the size of the aperture — the hole light passes through to enter a camera — to keep the starry background sharp and let the asteroid appear as a trail of light.

[piasa]

Is his name Mahdi Pooh-tin?

[M Kehoe]

DUCK!!!

5.56mm