The Vera C. Rubin Observatory detected asteroid 2025 MN45 in early 2026 using survey data.
The record-breaking spin offers new insight into asteroid strength and formation.
BulletsIn
- Fastest spin ever recorded for a large asteroid
- Asteroid named 2025 MN45
- About 710 metres wide, over 500-metre category
- Completes one full rotation every 1.88 minutes
- Located in the main asteroid belt
- Found during survey of nearly 2,000 asteroids
- Only 19 identified as superfast rotators
- Extreme speed indicates solid rock structure
- Challenges common rubble-pile asteroid theory




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