ARI katkat is a catalog of star catalogues in the spirit of G. Teleki's catalog of star catalogs (1989BOBeo.140..131T and references in there). It contains 2573 catalogs suitable for astrometric usage, starting with Flamsteed (1835) and ending in the 1970ies. For almost all of them, there is a column description file (as PDF, and unfortunately sometimes in German) and the digitized content.

• History of astronomy
• Catalogs

• Wielen, R.
• Erbach, M.
• Schwan, H.
• Demleitner, M.
• et al.

• katkat.data is licensed under the Creative Commons Attribution 4.0 License

  
• https://spdx.org/licenses/CC-BY-4.0.html

• katkat data is licensed under the Creative Commons Attribution 4.0 License

  

  The individual catalogs may have other licensing or copyright schemes, but in general a sound citation practice should be all right -- even more so since most of the individual authors are either dead or retired.