Hi,

Here are three links that will hopefully help you:

Catalog "readme":
http://cdsarc.u-strasbg.fr/viz-bin/Cat?cat=I%2F259&

Catalog information and links to download. When you get to this page, click on the "FTP" or "Browse" tabs to access the individual catalog parts for downloading via FTP. You may have some reorganizing to do, too:
http://www.astro.ku.dk/~erik/Tycho-2/

Interesting article:
http://www.nbi.ku.dk/english/news/ne...star_research/