v9 users: Please note that you may be eligible for a free upgrade to v10.
See the Register page for more details.
Catalogs (for offline use)
ATLAS (up to mag 18)*
ATLAS (up to mag 20)*
* Due to their size, download links for these catalogs are made available upon request for registered Tycho users.
For the best experience, it is recommended that you:
Tycho can be evaluated for free in demo mode using the DS1, DS2, DS3, and Ivar (night 1) datasets. To unlock more functionality, you are invited to register the software and obtain a license key. Please see the Register page for more details.