Fast rotation of a subkilometer-sized near-earth object 2011 XA3

Seitaro Urakawa, Katsuhito Ohtsuka, Shinsuke Abe, Takashi Ito, Tomoki Nakamura

研究成果: Article査読

4 被引用数 (Scopus)

抄録

We present light curve observations and their multiband photometry for near-Earth object (NEO) 2011 XA3. The light curve has shown a periodicity of 0.0304 ± 0.0003 days (= 43.8 ± 0.4 minutes). The fast rotation shows that 2011 XA3 is in a state of tension (i.e., a monolithic asteroid) and cannot be held together by self-gravitation. Moreover, the multiband photometric analysis indicates that the taxonomic class of 2011 XA3 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 XA3 is a candidate for the second-largest, fast-rotating, monolithic asteroid. Moreover, the orbital parameters of 2011 XA3 are apparently similar to those of NEO (3200) Phaethon, but F/B-type. We computed the orbital evolutions of 2011 XA3 and Phaethon. However, the results of the computation and distinct taxonomy indicate that neither of the asteroids is of common origin.

本文言語English
論文番号121
ジャーナルAstronomical Journal
147
5
DOI
出版ステータスPublished - 2014 5

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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