The user can define how to search the coincidence between the center fields and the catalogue objects. He can use a rectangular box on the tangent plane or retrieve all the objects that are closer than a defined distance, or he can have the nearest object only. The output file can be inserted in the Personal Data Base for future action. When target catalogue is sorted on a coordinate, this routine use a dichotomy search strategy, and the retrieval is fast. The user must enter the name of a PDB catalogue that contains the coordinates of the center fields.
Second coordinates are declination, ecliptic latitude, galactic latitude and so on.
The target catalogue can be a public catalogue or a personal one. The user must enter Y when the target catalogue is in Personal Data Base. The name of the target catalogue. Second coordinates are declination, ecliptic latitude, galactic latitude and so on. User must enter the name of the fields of the target catalogue to be written in the output file.