FAST ROTATION OF A SUBKILOMETER-SIZED NEAR-EARTH OBJECT 2011 XA3
FAST ROTATION OF A SUBKILOMETER-SIZED NEAR-EARTH OBJECT 2011 XA3
复制标题
亚千米大小的近地天体 2011 XA3 的快速旋转
DOI:
10.1088/0004-6256/147/5/121
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
and Tomoki Nakamura
中科院分区:
文献类型:
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作者:
Seitaro Urakawa;Katsuhito Ohtsuka;Shinsuke Abe;Takashi Ito;and Tomoki Nakamura
We present light curve observations and their multiband photometry for near-Earth object (NEO) 2011 XA 3. The light curve has shown a periodicity of 0.0304±0.0003 days (= 43.8±0.4 minutes). The fast rotation shows that 2011 XA 3 is in a state of tension (ie, a monolithic asteroid) and cannot be held together by self-gravitation. Moreover, the multiband photometric analysis indicates that the taxonomic class of 2011 XA 3 is S-complex, or V-type. Its estimated effective diameter is 225±97 m (S-complex) and 166±63 m (V-type), respectively. Therefore, 2011 XA 3 is a candidate for the second-largest, fast-rotating, monolithic asteroid. Moreover, the orbital parameters of 2011 XA 3 are apparently similar to those of NEO (3200) Phaethon, but F/B-type. We computed the orbital evolutions of 2011 XA 3 and Phaethon. However, the results of the computation and distinct taxonomy indicate that neither of the asteroids is of common origin.