1 Introduction

Since 1994 several CCD observing campaigns of major planetary satellites have been carried out at the Sheshan station near Shanghai using their 1.56 m astrometric reflector. Some of these results have been already published in Qiao et al. (1999, hereafter referred to as Paper I). During this period, observing campaigns of the Saturnian satellites were paralleled by an observing campaign of the five Uranian major satellites with aid of the same instrumental set-up.

In this paper, we publish all measured positions of the five major satellites of Uranus obtained during the observing campaigns in 1995, 1996 and 1997. The procedures of observing, measuring and calibration remain essentially the same as described in Paper I, and are briefly presented in Sects. 2 and 3. Analytical and numerical techniques were used in generating the ephemerides of satellites, which were applied both in calibration reduction and in analyzing the fit to the observations. The analytical theory used for fitting to observations is GUST86 (Laskar 1986; Laskar & Jacobson 1987). The results of this fitting are described in Sect. 4.

We also performed a least squares fitting of a numerical integration to GUST86. The whole numerical procedure as well as the results of the numerical integration fitting to observations and to analytical theory are presented in Sect. 5. Finally, in Sects. 6 and 7 we study the systematic errors and draw conclusions on the accuracy and dynamical consistency of the theory GUST86.