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A New Large Super-fast Rotator: (335433) 2005 UW163

Chang, Chan-Kao and Waszczak, Adam and Lin, Hsing-Wen and Ip, Wing-Huen and Prince, Thomas A. and Kulkarni, Shrinivas R. and Laher, Russ and Surace, Jason (2014) A New Large Super-fast Rotator: (335433) 2005 UW163. Astrophysical Journal Letters, 791 (2). Art. No. L35. ISSN 2041-8205.

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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 H_r' = 17.69 ± 0.27 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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Chang, Chan-Kao0000-0003-1656-4540
Lin, Hsing-Wen0000-0001-7737-6784
Ip, Wing-Huen0000-0002-3140-5014
Prince, Thomas A.0000-0002-8850-3627
Kulkarni, Shrinivas R.0000-0001-5390-8563
Laher, Russ0000-0003-2451-5482
Surace, Jason0000-0001-7291-0087
Additional Information:© 2014 The American Astronomical Society. Received 2014 July 9; accepted 2014 July 25; published 2014 August 6. This work is supported in part by the National Science Council of Taiwan under the grants NSC 101-2119-M-008-007-MY3. We are greateful for the indispensable support provided by the staff of the Palomar Observatory. We also thank the referee, Alan Harris, for useful comments that helped to improve the content of the paper.
Group:Infrared Processing and Analysis Center (IPAC), Palomar Transient Factory
Funding AgencyGrant Number
National Science Council (Taipei)NSC 101-2119-M-008-007-MY3
Subject Keywords:minor planets; asteroids: individual (335433); surveys
Issue or Number:2
Record Number:CaltechAUTHORS:20141002-133621218
Persistent URL:
Official Citation:A New Large Super-fast Rotator: (335433) 2005 UW163 Chan-Kao Chang et al. 2014 ApJ 791 L35
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50175
Deposited By: Jason Perez
Deposited On:06 Oct 2014 17:05
Last Modified:09 Mar 2020 13:19

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