doi:10.12202/j.0476-0301.2021046乔柯霖¹,
高健^1,,,
贾涵筇¹,
任逸¹,
宋腾飞²
1.北京师范大学天文系，100875，北京
2.中国科学院云南天文台，650216，云南昆明
基金项目:国家自然科学基金资助项目（U2031209，U2031148，11873092）

详细信息

通讯作者:高健（1977—），男，博士，教授. 研究方向：星际/星周尘埃、太阳系小天体. E-mail：jiangao@bnu.edu.cn

中图分类号:P185.7

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出版历程

收稿日期:2021-04-30
网络出版日期:2021-06-29
刊出日期:2021-10-01

Photometric properties of asteroid 8050 Beishida

Kelin QIAO¹,
Jian GAO^1,,,
Hanqiong JIA¹,
Yi REN¹,
Tengfei SONG²
1. Department of Astronomy, Beijing Normal University, 100875, Beijing, China
2. Chinese Academy of Science, Yunnan Observatory, 650216, Kunming, Yunnan, China



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摘要
摘要:为得到小行星“北师大星8050”的相关性质，使用中国科学院国家天文台兴隆观测站85 cm和云南天文台稻城选址点50 cm望远镜的观测数据，利用基于蒙特卡洛-马尔科夫链算法的盘积分Lommel-Seeliger椭球模型，对北师大星的相关参数进行了反演，得到北师大星的椭球半径长度分别为$(5.140\pm 0.010)、(1.698\pm 0.004)、(1.077\pm 0.004)\;{\rm{km}}$，自转周期为($ 5.397\pm 0.003 $)h，几何反照率$ {p}_{\rm{v}}=0.195\pm 0.001 $；在H-G₁-G₂星等系统下的相位因子${G}_{1}=0.259\pm 0.002$、$G_2=0.373\pm 0.001 $，自转轴指向的黄道坐标为$\left(104.68^\circ,\pm 80.06^\circ \right)$或$ (284.68^\circ,\pm 80.06^\circ ) $．
关键词:小行星/
北师大星8050/
测光/
光变曲线反演/
Lommel-Seeliger椭球/
蒙特卡洛-马尔科夫链
Abstract:The physical properties of asteroid such as albedo, shape and pole determination can be figured out by analyzing the light curves of the asteroid．In this paper, photometric data observed by the 85 cm telescope at Xinglong Station of NAOC (National Astronomical Observatories, Chinese Academy of Science) and 50 cm telescope at Yading Station of CASYO (Chinese Academy of Science, Yunnan Observatory) were used to obtain physical properties of Asteroid 8050 Beishida, by adopting disk-integrated brightness model of Lommel-Seeliger scattering ellipsoid based on Monte Carlo-Markov chain method．The ellipsoidal parameters of Beishida were found to be (5.140 ± 0.010) , ( 1.698 ± 0.004) , ( 1.077 ± 0.004)km; the spinning period was (5.397 ± 0.003)h; the geometric albedo was 0.195 ± 0.001; the phase parameters were G₁ = 0.259 ± 0.002 and G₂ = 0.373 ± 0.001, respectively．The ecliptic coordinates of pole determination were found to be (104.68°/284.68°, ±80.06°)．
Key words:asteroids/
aseroids 8050 Beishida/
photometry/
lightcurve inversion/
Lommel-Seeliger ellipsoid/
Monte Carlo-Markov chain