Astrometric observations of the Sun at Santiago: 1998-2000

A program of solar astrometry with a modified Danjon astrolabe has been in progress since 1990 at the National Astronomical Observatory at Cerro Calan , Santiago, Chile. More than 3200 homogeneous observations have been made v isually by a single observer at 30 degrees and 60 degrees zenith distances. Here we present and discuss the results in right ascension, parameter Y an d apparent solar radius obtained during the period 1998-2000. These results and those obtained in former years are available in electronic form(star s tar). After almost 11 years of continuous observations, the most interestin g aspect of the solar results of the Santiago astrolabe is a significant an d positive correlation between variations in time of the apparent semidiame ter of the Sun and solar activity.