A new large super-fast rotator: (335433) 2005 UW163

Chan Kao Chang, Adam Waszczak, Hsing Wen Lin, Wing Huen Ip, Thomas A. Prince, Shrinivas R. Kulkarni, Russ Laher, Jason Surace

研究成果: 雜誌貢獻期刊論文同行評審

20 引文 斯高帕斯(Scopus)


Asteroids of size larger than 150 m generally do not have rotation periods smaller than 2.2 hr. This spin cutoff is believed to be due to the gravitationally bound rubble-pile structures of the asteroids. Rotation with periods exceeding this critical value will cause asteroid breakup. Up until now, only one object, 2001 OE84, has been found to be an exception to this spin cutoff. We report the discovery of a new super-fast rotator, (335433) 2005 UW163, spinning with a period of 1.290 hr and a light curve variation of r′ ∼ 0.8 mag from the observations made at the P48 telescope and the P200 telescope of the Palomar Observatory. Its mag and multi-band colors (i.e., g′-r′ = 0.68 ± 0.03 mag, r′-i′ = 0.19 ± 0.02 mag and SDSS i-z = -0.45 mag) show it is a V-type asteroid with a diameter of 0.6 + 0.3/-0.2 km. This indicates (335433) 2005 UW163 is a super-fast rotator beyond the regime of the small monolithic asteroid.

期刊Astrophysical Journal Letters
出版狀態已出版 - 20 8月 2014


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