小行星“北师大星8050”的测光性质研究

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±0.010)、(1.698±0.004)、(1.077±0.004) km,自转周期为(5.397±0.003)h,几何反照率pv=0.195±0.001;在H-G1-G2星等系统下的相位因子G1=0.259±0.002、G2=0.373 ±0.001,自转轴指向的黄道坐标为(104.68.,±80.06.)或(284.68.,±80.06.).

Photometric properties of asteroid 8050 Beishida

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°)．