Install casacore-data-sources by entering the following commands in the terminal:
sudo apt update sudo apt install casacore-data-sources
Table of ICRF reference source coordinates for casacore
This package contains a table with the sources that realize the and the International Celestial Reference Frame (ICRF), as a table for the use with casacore. The ICRF is now the standard reference frame used to define the positions of the planets (including the Earth) and other astronomical objects.