The asteroid, 2025 MN45, completes a full rotation once every 1.88 minutes, meaning it must have a very high strength to keep itself together. An artist's impression of the asteroid 2025 MN45. NSF–DOE Vera C. Rubin Observatory/NOIRLab/SLAC/AURA/P. Marenfeld ===================================================================== The Vera C. Rubin Observatory has observed a record-breaking ultra-fast-rotating asteroid. The space rock is the fastest-spinning asteroid larger than 500 meters (0.3 miles) to have ever been observed. The asteroid, designated 2025 MN45, completes a full rotation every 1.88 minutes. Announced at the NSF–DOE Vera C. Rubin Observatory First Look event in June 2025, it was one of 1,900 new...