题  目：4179 Toutatis: New Insights from Chang’e-2’s Close Flyby 

　　报告人：赵玉晖 助理研究员（紫金山天文台）

　　摘  要：The Apollo-type near-Earth asteroid (4179) Toutatis was originally discovered in 1934 and remained a lost asteroid until it was once again detected in 1989 in Caussols, France. From a dynamical viewpoint, the asteroid moves on an approximately 4:1 resonant orbit at a large eccentricity with the Earth and has passed through a close encounter with the Earth every four years since 1992. On 13 Dec 2012, 4179 Toutatis was closely observed by Chang'e-2 which is a second Chinese lunar probe dedicated to the Moon's exploration at a distance of 1.3 km during the outbound flyby. A sequence of high-resolution images was acquired during the mission. Pre-researches as orbit determination, imaging strategies for the mission and new results from the mission will be introduced.

　　时间及地点：4月29日（周三）下午2:30，天文楼202会议室 

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　                                    　南京大学天文与空间科学学院