Photometry and Spectroscopy of the Potentially Hazardous Asteroid 2001 YB5 and Near-Earth Asteroid 2001 TX16

Photometry and Spectroscopy of the Potentially Hazardous Asteroid 2001 YB5 and Near-Earth Asteroid 2001 TX16
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潜在危险小行星 2001 YB5 和近地小行星 2001 TX16 的光度测定和光谱学

DOI:
10.1086/376839
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发表时间:
2003-08
期刊:
AJ, 126, 1086
影响因子:
--
通讯作者:
M.
M.
中科院分区:
其他
文献类型:
--
作者:
Yang;B.;Zhu;J.;Gao;J.;Ma;J.;Zhou;X.;Wu;H.;Guan;M.

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2002年1月,中国国家天文台0.6/0.9 m施密特望远镜对两颗近地小行星2001 YB5和2001 TX16进行了CCD光度观测。对这两个天体的光变曲线分析显示,2001 YB5 的自转周期为 3.20 ± 0.03 小时,振幅为 0.21 ± 0.02 星等,2001 TX16 的自转周期为 4.8005 ± 0.0003 小时,振幅为 0.51 ± 0.01 星等。使用 NAOC 2.16 m 望远镜对两个近地天体进行了光谱观测,范围为 5000 至 9000 Å。 2001 YB5的反射光谱略带蓝色,可能在8000至9000 Å之间有一个弱吸收带,这与B型小行星的光谱一致。 2001 TX16 的光谱平坦,吸收带中心位于 7000 埃附近,与 Ch 型小行星的光谱一致。
CCD photometric observations of the two near-Earth asteroids (NEAs) 2001 YB5 and 2001 TX16 were carried out in 2002 January with the 0.6/0.9 m Schmidt telescope of the National Astronomical Observatories of China (NAOC). Analysis of the light curves of these two objects reveals rotation periods of 3.20 ± 0.03 hr with amplitude 0.21 ± 0.02 mag for 2001 YB5 and 4.8005 ± 0.0003 hr with amplitude 0.51 ± 0.01 mag for 2001 TX16. Spectroscopic observations of the two NEAs were made with the NAOC 2.16 m telescope, ranging from 5000 to 9000 Å. The reflectance spectrum of 2001 YB5 is a little bluish, with a possible weak absorption band from 8000 to 9000 Å, which is consistent with the spectra of B-type asteroids. That of 2001 TX16 is spectrally flat, with a shallow absorption band centered near 7000 Å, consistent with the spectra of Ch-type asteroids.
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