Ground-based modelling of the shape and the rotation of the minor planets requires high precision and long-term photometric observations. With the advent of the CCD era it has become possible to study much fainter minor planets than previously. The photometric methods of modelling are based on multi-opposition lightcurves of full phase coverage obtained at very different longitudes (De Angelis 1993; Detal et al. 1994). A new approach to the modelling of rotation is presented in Szabó et al. (1999). It consists of investigating virtual period changes caused by the revolution through the O-C-geocentric longitude diagram. Therefore, observations of light extrema could also be of great importance.
We started a new observing programme in 1998 with the primary purpose of obtaining accurate CCD lightcurves of poorly studied minor planets. The main programme is dedicated to asteroids with available two-opposition lightcurves, where a third lightcurve enables the complex analyis. Additional targets are those asteroids with no previous photometric measurements.
The function of this paper is to present new CCD observations for eleven asteroids with very few photometric data in the literature. The observations are discussed in Sect. 2, while Sect. 3 deals with the detailed observational results.
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