Study of photometric phase curve with new brightness model: refining phase function system parameters of asteroid (107) Camilla

• 来源期刊: 天文和天体物理学研究
• 年，卷（期）: 2016,（9）
• 页码范围: 117-122
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-4527/16/9/147

摘要

We characterize the morphology of the photometric phase curve model of an asteroid with a three-parameter magnitude phase function H-G1-G2 system by considering the effect of brightness variation arising from a triaxial ellipsoid representing the asteroid's shape.Applying this new model and a Markov Chain Monte Carlo method,we refine the photometric phase curve of asteroid (107) Camilla and obtain its absolute magnitude H =7 026+0.052 mag,and phase function parameters G1=0 489+0.043-0.044 and G2 =0959+0.023-0.023 Meanwhile,we also determine (107) Camilla's orientation of pole (74.1°+4.3°-4.5°,50.2+5.4°-5.0°)with rotational period of 4 843928+0.000001-0.000001 h,and axial ratios a/b =1.409+0.020-0.020 and b/c =1.249+0.063-0.060.Furthermore,according to the values of phase function parameters G1 and G2,we infer that asteroid (107) Camilla is an X-type asteroid.