What is in SIMBAD?

SIMBAD is a dynamic database of astronomical objects. It provides the bibliography, as well as basic information such as the nature of each object, its coordinates, magnitudes, proper motions and parallax, velocity/redshift, angular size, spectral or morphological type, and the multitude of names (identifiers) given in the literature. The information in SIMBAD is a compilation built from what is published in the literature with expert cross-identification performed at the CDS based on the compatibility of several parameters, to the limit of reasonably good astrometry. We show the data integration processes in SIMBAD.