EPHEMERIDES OF THE 48 HIPPARCOS MINOR PLANETS FOR THE YEAR 1992

To be observed by Hipparcos, the position of each object has to be kno wn with an accuracy of 1 arcsecond and its magnitude with an accuracy of 0.5 mag. Therefore, the orbital elements of the 48 selected minor p lanets of the Hipparcos mission, have been improved in order to extrap olate their ephemerides with the accuracy required. Updated ephemeride s are given here for the year 1992, referred to the two reference fram es: J2000 and 1950.0. The orbital elements which have been used to com pute these ephemerides are also given.