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Außer dem potentiellen Zwergplaneten 2026 ED138 hat das neue Rubin Observatory in seiner Kommissionsphase bereits tausende neue Asteroiden gefunden, von denen einige durch ihre außerordentlich hohe Spinrate auffallen. Dazu gehört insbesondere
2025 MN45
2025 MN45
Aus der Lichtkurve schließt man auf eine elongierte Form.
Lightcurves, Rotation Periods, and Colors for Vera C. Rubin Observatory’s First Asteroid Discoveries
Gruß, Peter
2025 MN45
2025 MN45 is a rapidly rotating main-belt asteroid 0.71 kilometers in diameter, discovered by the Vera C. Rubin Observatory on 2 May 2025. It has the shortest known rotation period of any asteroid with a diameter larger than 0.5 km as of 2026, completing one rotation approximately every 1.88 minutes. The extreme spin rate of 2025 MN45 indicates that it is not a rubble pile, but is instead made of a strong material like solid rock which prevents centrifugal forces from breaking it apart.
2025 MN45
Aus der Lichtkurve schließt man auf eine elongierte Form.
Lightcurves, Rotation Periods, and Colors for Vera C. Rubin Observatory’s First Asteroid Discoveries
Rubin-discovered MBA 2025 MN45 is the fastest-rotating d > 0.5 km known asteroid with a rotation period of 1.9 minutes; along with NEO 2025 MJ71 (1.9 minutes) and Rubin-discovered MBAs 2025 MK41 (3.8 minutes), 2025 MV71 (13 minutes), and 2025 MG56 (16 minutes), these five super- to ultrafast rotators join a couple of NEOs as the fastest-spinning subkilometer asteroids known.
Gruß, Peter
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