$ sudo apt-get update
$ sudo apt-get install astrometry-data-tycho2-08 

astrometry-data-tycho2-08 is installed in your system.

Make ensure the astrometry-data-tycho2-08 package were installed using the commands given below,

$ sudo dpkg-query -l | grep astrometry-data-tycho2-08 *

You will get with astrometry-data-tycho2-08 package name, version, architecture and description in a table

astrometry-data-tycho2-08 package basic information: