Open data

Zenith's star and deep sky catalogs are built from data shared under the Creative Commons Attribution-ShareAlike 4.0 license. Our processed versions are shared under the same license.

Download the processed catalogs (17 Oct 2026)

• Stars: AT-HYG v4.0 and the HYG Database v4.4 by David Nash (astronexus), CC BY-SA 4.0, incorporating Tycho-2, Gaia DR3 (ESA/Gaia/DPAC) and Hipparcos (ESA).
• Deep sky objects and galaxies: OpenNGC by Mattia Verga, CC BY-SA 4.0, based on data from NED, HyperLEDA and SIMBAD.

The download includes the files, the scripts that made them and a list of every change from the sources. License: CC BY-SA 4.0.