Abstract
Initiating a scientific cooperation program between Valongo and San Juan Observatories, Brazil and Argentina respectively, asteroids were observed during one week at the "El Leoncito" astrometric telescope (D = 50 cm, F = 3741 m). The plates were identified and reduced at the Ohservat6rio do Valongo (UFRJ) through least squares and dependences methods, with the help of the Burroughs 6700 computer of the Nu'cleo de Eletronica (UFRJ). Five reference stars were used, the positions and proper motions being obtained from the SAO Catalogue (1966); ephemerides for the asteroids were taken from Ephemeridi Malik Planet (1983).
