  The great development of astrometric accuracy since the observations by the
Greek astronomer Hipparchus about 150 BC has often been displayed in diagrams
showing the accuracy versus time. Two new diagrams are provided here, one for
positions only, another including parallaxes. New information is included on
the Gaia DR3 data and the coming data releases, and about two great astronomers
from the distant past, Wilhelm in Kassel and al-Sufi in Isfahan.
