CORRECTIONS TO THE FK5 REFERENCE FRAME FROM SUN OBSERVATIONS WITH THEASTROLABES AT ABRAHAO-DE-MORAES (1988-1994) AND CALERN (1988-1991) OBSERVATORIES

In this paper we show the results of the astrometric observational pro gram of the Sun accomplished with the modified Danjon astrolabe at the Abrahao de Moraes (OAM, phi = -23 degrees 00'06 '', lambda = +03(h)07 (m)52(s).2 - Brazil) and Calern (OCA, phi = +43 degrees 44'55.888 '', lambda = -00(h)27(m)42(s).442 - France) Observatories. The combination of these observations allows to cover in full the apparent orbit of t he Sun. The main purpose of this program is to determine the orientati on of the new fundamental reference coordinate system as well as the c orrections to the Earth's orbit parameters. The observations are reduc ed to the system FK5. The global solution obtained by least squares me thod reveals corrections -0.03 '' +/- 0.01 '' and +0.10 '' +/- 0.02 '' to the means values of the equator and equinox, respectively. It appe ars that the available new data do not reveal a significant correction to the FK5.