目前所探测到的67万多颗太阳系小行星中,仅有0.9%不到的小行星具有光变数据。小行星光变曲线是小行星自转状态和不规则形状的反应,是研究太阳系小天体的形成和演化的重要数据,为研究小行星小行星内部结构和表面物理性质提供重要信息。现有的大部分光变数据都是通过单目标观测获得的数据积累,观测效率低。为了扩大小行星光变曲线样本容量,有效提高观测效率,本项目申请人计划利用大视场的近地天体望远镜,同时对多个小行星目标进行光变观测,开发大视场小行星光变数据处理流程。获取大量小行星光变数据，分析测定小行星自转周期，通过光变曲线反演小行星形状和自转轴指向;并根据自转轴指向分布结合数值模拟估计小行星族群年龄。

Over 670,000 small objects of our Solar System have been detected, But only 0.9% of them with lightcurve data. Photometric lightcurves are and will remain a major source of information about rotation state, irregular shape, internal structure of asteroids, and about formation and evolution of small objects in the Solar System. Most of the existing lightcurve data is accumulated by inefficient single-target observations. In order to expand the number of asteroid light curves and improve observing efficiency, we will use the wide-field Xuyi Near Earth Object Telescope (NEOT) observe multi-objective asteroids lightcurve at sametime, and develop data processing pipeline for the wide-field survey of asteroids lightcurve. We will get a lot of asteroids lightcurve data, analyze the asteroid's period, and determined them shape and orientation of polar by the lightcurve inversion method. According to the distribution of the orientation of polar and the numerical simulation, asteroid family age will be estimated.