Astronomers Discovered Two Massive Fast-Spinning Asteroids
Researchers identified two large asteroids that complete full rotations in only five minutes.
Updated on Oct. 10, 2026 in Space
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Scientists have identified two asteroids larger than two kilometers in width that spin at extreme speeds. These objects complete a full rotation every five minutes, far exceeding typical rotational limits.
Why it matters
The high rotation speed suggests these asteroids are monolithic objects rather than loose rubble piles, indicating they possess significant internal structural strength. These findings challenge previous models regarding asteroid composition and physical integrity.
Researchers analyzed 260 asteroids from a sample of 9000, finding 66 that rotate faster than the 2.2-hour limit required for gravitational binding. The two largest objects exceed two kilometers in width and rotate every five minutes.
The players
Vera C. Rubin Observatory
This facility is a major astronomical research site located in Chile that conducts long-term sky surveys.
The details
Using data from the Vera C. Rubin Observatory in Chile, astronomers measured rotation based on brightness fluctuations caused by irregular object shapes. The study reveals these asteroids may be at least 30 times stronger than clay, allowing them to maintain their shape despite the centrifugal force generated by their rapid spin.
Timeline
The Vera C. Rubin Observatory began its 10-year sky survey in June 2026.
The solar system has an estimated history of 4.6 billion years.
The Big Picture
This finding updates current models of asteroid mechanics by confirming the existence of monolithic structures capable of surviving extreme rotational forces. It forces a reassessment of the 2.2-hour gravitational binding limit that was previously considered a standard threshold for celestial objects.
While these findings impact theoretical astrophysics, they provide critical data for planetary defense by improving our understanding of asteroid strength and structure. This knowledge helps scientists predict how space rocks might react if they ever encountered human-made interference or impact mitigation attempts.
The takeaway
The discovery of these fast-spinning asteroids suggests that large space rocks can be significantly more durable than previously thought. Researchers will continue to monitor these objects to better understand how they maintain their structural integrity over billions of years.
Further reading
For more on recent astronomical findings, explore the Space section.
Source note: This article includes information reported by New Scientist.
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