中文摘要：

2011年12月到2012年2月期间对小行星（26）Proserpina进行了时序测光观测，获得其白转的会合周期为P=（13．107±0．002）h．结合历史测光数据，采用光变曲线凸壳反演方法对其自转状态和形状进行反演研究，并提出采用Bootstrap方法对反演参数进行误差估计．测定出（26）Proserpina是一个逆转的小行星，其极轴指向解为λ1=90．8°±1．4°，β1=-53．1°±3．2°和λ2=259．3°±2．2°，β2=62．0°±2．0°；测定其自转的恒星周期为（13．109777±3．8×10^-6）h；并基于两个极轴解反演出互为镜像的凸壳形状模型．

英文摘要：

We present new CCD observations of the asteroid （26） Proserpina carried out between 2011 December and 2012 February. A synodic period of （13.107± 0.002） h based upon the new observations is obtained. Using all available light curves, the spin vectors, period of rotation, and the shape model of the asteroid are determined with the convex inversion method. Further more, a Bootstrap method is applied to estimate the uncertainties of the spin parameters. We derive a pair of possible poles for （26） Proserpina, and believe that it has a retrograde rotation state. The poles are determined λ1=90.8°±1.4°,β1=-53.1°±3.2°, and mirror solution of λ2=259.3°±2.2°,β2=62.0°±2.0°. The spin period corresponding to the two poles is almost the same as （13.109777±3.8×10^-6） hours. For the asteroid, the convex shapes corresponding to the pairs of poles are mirror images of each other.