Asteroidal recovering in the DENIS survey. A contribution of near-infrared for classifications

Abstract

The Deep European Near-Infrared southern sky Survey (DENIS) has been observing the sky since december of 1995, in the three bands I, J, K of the near-infrared, in order to provide to the community a deep and extensive photometric catalogue of stars and galaxies. In addition, the asteroids will be included in the catalogue as any other regular point sources. Therefore, in the frame of asteroidal taxonomies, this project appeared as a good opportunity to enlarge the asteroid colorimetry data base to new colours and more objects. In order to use the DENIS data for our case, we had, as a first step, to determine all the asteroids observed during the survey to recover them in the catalogue of magnitudes. We present here our recovery procedure and our final expectations. The ultimate aim of this study will be to improve our knowledge on the compositional structure of the asteroidal population.