npa旋转体(5247)krylov的光度学研究

IF 1.1 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Journal of the Korean Astronomical Society Pub Date : 2017-06-30 DOI:10.5303/JKAS.2017.50.3.41

Hee-Jae Lee, H. Moon, Myung-Jin Kim, Chun-Hwey Kim, J. Ďurech, Young‐Jun Choi, Y. Oh, Jintae Park, D. Roh, H. Yim, S. Cha, Yongseok Lee

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引用次数: 2

摘要

2016年1月至2016年4月，利用韩国微透镜望远镜网络(KMTNet)对Krylov小行星(5247)进行了51晚的BVRI和R波段光度观测。(5247) Krylov在光曲线最大值处的显色指数分别为B−V = 0.841±0.035,V−R = 0.418±0.031,V−I = 0.871±0.031，相位角为14.1◦。它们是在使用集合归一化技术对BVRI仪器测量进行标准化后获得的。根据颜色指数，(5247)Krylov被归类为s型小行星。通过对其R波段光曲线的周期搜索，确定了双周期，即主周期P1 = 82.188±0.013 h，次周期P2 = 67.13±0.20 h。光曲线与P1相位，这表明它是一颗典型的非主轴(NPA)小行星。我们讨论了其NPA旋转的可能原因。

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PHOTOMETRIC STUDY OF NPA ROTATOR (5247) KRYLOV

We conduct BVRI and R band photometric observations of asteroid (5247) Krylov from January 2016 to April 2016 for 51 nights using the Korea Microlensing Telescope Network (KMTNet). The color indices of (5247) Krylov at the light curve maxima are determined as B − V = 0.841 ± 0.035, V −R = 0.418± 0.031, and V − I = 0.871± 0.031 where the phase angle is 14.1◦. They are acquired after the standardization of BVRI instrumental measurements using the ensemble normalization technique. Based on the color indices, (5247) Krylov is classified as a S-type asteroid. Double periods, that is, a primary period P1 = 82.188 ± 0.013 h and a secondary period P2 = 67.13 ± 0.20 h are identified from period searches of its R band light curve. The light curve phases with P1 and this indicate that it is a typical Non-Principal Axis (NPA) asteroid. We discuss the possible causes of its NPA rotation.

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来源期刊

Journal of the Korean Astronomical Society 地学天文-天文与天体物理

CiteScore

1.30

自引率

10.00%

发文量

审稿时长

>12 weeks

期刊介绍： JKAS is an international scientific journal publishing papers in all fields of astronomy and astrophysics. All manuscripts are subject to the scrutiny of referees. Manuscripts submitted to JKAS must comply with the ethics policy of JKAS. Six regular issues are published each year on February 28, April 30, June 30, August 31, October 31, and December 31. One year''s issues compose one volume.