FAST ROTATION OF A SUBKILOMETER-SIZED NEAR-EARTH OBJECT 2011 XA3

FAST ROTATION OF A SUBKILOMETER-SIZED NEAR-EARTH OBJECT 2011 XA3
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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:
The Astronomical Journal
影响因子:
--
通讯作者:
and Tomoki Nakamura
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

文献摘要

相似文献

本文介绍了近地天体(NEO) 2011 XA 3的光曲线观测及其多波段光度测量。光照曲线的周期为0.0304±0.0003天(= 43.8±0.4分钟)。快速旋转表明2011 XA 3处于一种紧张状态(即,一颗单一的小行星),不能通过自我引力将其聚集在一起。此外,多波段光度分析表明,2011 XA 3的分类类别为S-complex,即v型。其估计有效直径分别为225±97 m (s型)和166±63 m (v型)。因此,2011 XA 3是第二大快速旋转的单片小行星的候选者。此外,2011 XA 3的轨道参数与近地天体(3200)Phaethon的轨道参数明显相似,但属于F/ b型。我们计算了2011 XA 3和Phaethon的轨道演变。然而,计算结果和不同的分类表明,这两颗小行星都不是共同的起源。
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.